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An yearly reward for the best article authored can also incentivize the authors. Though the process of finding the best article will be not be very easy. I do not know how reviewing process can be improved. If an article is being reviewed by two reviewers, then opinion of one can be communicated to the other or the final opinion of the editor can be communicated to the reviewer if requested for. This will help one’s reviewing skills.
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Aug 2018

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Thanking you
With sincere regards
Dr. Rajendra Kumar Ghritlaharey, M.S., M. Ch., FAIS
Associate Professor,
Department of Paediatric Surgery, Gandhi Medical College & Associated
Kamla Nehru & Hamidia Hospitals Bhopal, Madhya Pradesh 462 001 (India)
On May 11,2011

Dr. Shankar P.R.

"On looking back through my Gmail archives after being requested by the journal to write a short editorial about my experiences of publishing with the Journal of Clinical and Diagnostic Research (JCDR), I came across an e-mail from Dr. Hemant Jain, Editor, in March 2007, which introduced the new electronic journal. The main features of the journal which were outlined in the e-mail were extensive author support, cash rewards, the peer review process, and other salient features of the journal.
Over a span of over four years, we (I and my colleagues) have published around 25 articles in the journal. In this editorial, I plan to briefly discuss my experiences of publishing with JCDR and the strengths of the journal and to finally address the areas for improvement.
My experiences of publishing with JCDR: Overall, my experiences of publishing withJCDR have been positive. The best point about the journal is that it responds to queries from the author. This may seem to be simple and not too much to ask for, but unfortunately, many journals in the subcontinent and from many developing countries do not respond or they respond with a long delay to the queries from the authors 1. The reasons could be many, including lack of optimal secretarial and other support. Another problem with many journals is the slowness of the review process. Editorial processing and peer review can take anywhere between a year to two years with some journals. Also, some journals do not keep the contributors informed about the progress of the review process. Due to the long review process, the articles can lose their relevance and topicality. A major benefit with JCDR is the timeliness and promptness of its response. In Dr Jain's e-mail which was sent to me in 2007, before the introduction of the Pre-publishing system, he had stated that he had received my submission and that he would get back to me within seven days and he did!
Most of the manuscripts are published within 3 to 4 months of their submission if they are found to be suitable after the review process. JCDR is published bimonthly and the accepted articles were usually published in the next issue. Recently, due to the increased volume of the submissions, the review process has become slower and it ?? Section can take from 4 to 6 months for the articles to be reviewed. The journal has an extensive author support system and it has recently introduced a paid expedited review process. The journal also mentions the average time for processing the manuscript under different submission systems - regular submission and expedited review.
Strengths of the journal: The journal has an online first facility in which the accepted manuscripts may be published on the website before being included in a regular issue of the journal. This cuts down the time between their acceptance and the publication. The journal is indexed in many databases, though not in PubMed. The editorial board should now take steps to index the journal in PubMed. The journal has a system of notifying readers through e-mail when a new issue is released. Also, the articles are available in both the HTML and the PDF formats. I especially like the new and colorful page format of the journal. Also, the access statistics of the articles are available. The prepublication and the manuscript tracking system are also helpful for the authors.
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Overall, the publishing process with JCDR has been smooth, quick and relatively hassle free and I can recommend other authors to consider the journal as an outlet for their work."

Dr. P. Ravi Shankar
KIST Medical College, P.O. Box 14142, Kathmandu, Nepal.
On April 2011

Dear team JCDR, I would like to thank you for the very professional and polite service provided by everyone at JCDR. While i have been in the field of writing and editing for sometime, this has been my first attempt in publishing a scientific paper.Thank you for hand-holding me through the process.

Dr. Anuradha
On Jan 2020

Important Notice

Original article / research
Year : 2021 | Month : July | Volume : 15 | Issue : 7 | Page : QC24 - QC27 Full Version

Effectiveness of Letrozole and Human Chorionic Gonadotropin Injection in Ovulation Induction: A Cohort Study

Published: July 1, 2021 | DOI:
Peter Chukwudi Udealor, Eric Ezenwa Asimadu, Emeka Iloghalu

1. Lecturer, Department of Obstetrics and Gynaecology, College of Medicine, University of Nigeria, Itukuozalla Campus, Enugu, Nigeria. 2. Reader, Department of Obstetrics and Gynaecology, College of Medicine, University of Nigeria, Itukuozalla Campus, Enugu, Nigeria. 3. Senior Lecturer, Department of Obstetrics and Gynaecology, College of Medicine, University of Nigeria, Itukuozalla Campus, Enugu, Nigeria.

Correspondence Address :
Eric Ezenwa Asimadu,
Reader, Department of Obstetrics and Gynaecology, College of Medicine, University of Nigeria, Itukuozalla Campus, Enugu, Nigeria.


Introduction: Ovulation stimulation followed by timed intercourse or Intrauterine Insemination (IUI) is widely used for treatment of anovulatory infertility.

Aim: To compare the effectiveness of Letrozole (LE) alone versus LE and human chorionic gonadotropin injection in ovulation induction and pregnancy rates in women undergoing ovulation induction/follicular tracking in Enugu, Nigeria.

Materials and Methods: The longitudinal cohort study was carried out in University of Nigeria Teaching Hospital and Livingston Specialist Gynaecological Hospital in Enugu, Nigeria. Study population were women coming for ovulation stimulation/follicular tracking. Ovulation was confirmed by ultrasound evidence of ovulation with a progesterone level of greater or equal to 25 nmol/L on day 21, positive pregnancy test/ultrasound detection of a gestational sac. Patients were consecutively assigned to group A or B. Group A received LE only for the induction while group B received 10000 IU of human chorionic gonadotropin injection in addition to LE. A total of 5 mg of LE was given daily from day 3 to day 7. The primary outcome measured was the number of ruptured/crenated follicles on either arm while the secondary outcomes were the number of Luteinised Unruptured Follicles (LUF) and pregnancy rates. The Statistical analysis was performed using the Statistical Package for the Social Sciences version 21.0 software (SPSS Inc., Chicago, IL, United States).

Results: A total of 50 women were in each arm of the study. There was no significant difference in age and parity between the two arms. There was no significance difference between the period of infertility and the number of the previous cycles of ovulation stimulation. (p=0.444 and 0.526, respectively). Ovulation was significantly associated with HCG injection (p=0.001). However, there was no statistical significance between both arms regarding the number of LUF (p=0.216). HCG injection was significantly associated with pregnancy. Subjects who took HCG injection were over two times more likely to become pregnant than those without HCG injection (OR=2.488, 95% CI for OR=1.057-5.857, p=0.037).

Conclusion: This study showed that both the ovulation rate and pregnancy rate are significantly improved when human chorionic gonadotrophin injection is given after ovarian stimulation.


Infertility, Polycystic ovary, Pregnancy

Infertility is commonly defined as the failure to achieve conception after a minimum of 12 months of unprotected intercourse (1). Polycystic Ovary Syndrome (PCOS) is the most common condition that leads to anovulatory infertility in young women. There has been a significant increase in the number of women that present with PCOS and leading to increased scientific examination towards understanding the syndrome (2). The syndrome has several clinical manifestations, and anovulatory infertility is one of the most common (3).

Ovarian stimulation followed by timed intercourse or IUI is used for the treatment of various forms of infertility, like anovulatory infertility, unexplained infertility, male-factor infertility, and other disorders of infertility (4). This treatment modality is used when the female partner has one or both tubes patent and some ovarian function, and the male partner has active and motile sperm cells (5). For infertile couples that meet these criteria, combining ovarian stimulation with IUI can be an effective means of achieving pregnancy.

Clomiphene Citrate (CC) was the first commonly used ovulation induction drug in clinical practice. It has structural similarities to oestrogen and is a Selective Oestrogen Receptor Modulator (SERM). It is a competitive inhibitor of oestrogen, and its actions results in increased pituitary gonadotropin hormones secretion (6). Use of CC in ovulation induction gives a 60-85% ovulation rate, and results in a 10-20% pregnancy rate per cycle (7). CC has anti-oestrogenic effects on the endometrium; this results in a poor pregnancy rate and can lead to a significant rate of early pregnancy loss due to Oestrogen Receptor (ER) depletion (8). The long half-life of CC also leads to its accumulation in the body and prolongs these adverse effects (6).

More recently, LE, an aromatase inhibitor, used for the treatment of breast cancer, has been widely used for ovulation induction. LE prevents the conversion of androgen to oestrogen by inhibiting aromatase activity in-vivo. This releases the negative feedback effect of oestrogen on the hypothalamus and pituitary leading to release of gonadotrophins; causing follicular growth and subsequent ovulation (9). LE induces ovulation in about 60-80% of patients, and more rapidly excreted from the body than CC (10). LE has been shown to have good ovulation rate of about 62% in CC-resistant PCOS women, and leads to pregnancy in 14.7%; and, does not have any adverse effects on the fetus and is safe (11).

There are numerous parameters which can affect treatment result after ovarian stimulation and timed-intercourse or IUI (12). Parameters are age of the woman, semen parameters and method of semen preparation (13), the quantity of inseminations done (14),(15) as well as the quantity of preovulatory follicles, period of infertility, and kind of infertility and quantity of preceding management cycles (16). It has been recommended that the timing of insemination in IUI cycles with ovulation is most likely the most significant variable affecting the success of treatment (16).

This study aimed at investigating the effectiveness of LE versus LE and human chorionic gonadotrophin on ovulation and pregnancy rates in a cohort of women in Enugu, Southeast Nigeria.

Material and Methods

This was a prospective longitudinal cohort study. The study was carried out in University of Nigeria Teaching Hospital, Enugu and Livingston specialist Gynaecological Hospital, in Enugu between May 2019 to April 2020. The study was conducted after obtaining ethical clearance from the Ethics committee of the University of Nigeria Teaching Hospital, Enugu, Nigeria (NHREC/05/01/2008B-FWA00002458-1RB00002323). The study population was drawn from women coming for ovulation stimulation/follicular tracking who met the eligibility criteria.

Inclusion criteria: Women with ovulation factor infertility (primary or secondary), Women with normal HSG result, women whose husband had a normal semen analysis, women below 40 years of age were included.

Exclusion criteria: All those who did not meet the inclusion criteria were excluded.

Sample size calculation: The sample size was calculated to detect a difference of 5% in ovulation rate between the two groups with a standard deviation of 0.6 and a power of 90% assuming two-tailed alpha error of 0.05. 50 patients were recruited in each arm of the study.

Study Procedure

Patients seen in clinic, who consented to the study, were consecutively assigned to group A or B. Both groups received preconception 5 mg folic acid daily. All women who were confirmed pregnant were given Dydrogesterone (Duphaston®) 10 mg twice daily for 12 weeks. Group A received LE only for the induction while group B received, 10,000 IU of human chorionic gonadotropin injection by route in addition to LE. A 5 mg of LE was given daily from day 3 to day 7. Transvaginal ultrasound was commenced on day 7 of the cycle and continued every other day until dominant follicle or follicles of about 18 mm or above were obtained. The transvaginal scan was done by one or a maximum of two radiologists to reduce measurement bias. The power of the transvaginal probe used is 7.5 MHz. Those that received HCG injection were given the injection when follicle/s of about 18 mm diameter was obtained while those without were not given the injection. Transvaginal ultrasound was continued on alternate days as above to confirm ovulation. Crenation of the follicle and the presence of fluid in the pouch of douglas was considered to be the signs of rupture of the follicle. Follicles that attained dominant size but yet unruptured on day 21 or 7 days after HCG injection or those with a diameter of up to 30 mm were considered luteinised follicles. Confirmation of ovulation was done by:

• Ultrasound evidence of ovulation with a progesterone level of greater or equal to 25 nmol/L on day 21
• Positive pregnancy test/ultrasound detection of a pregnancy.

The primary outcome was the number of ruptured/crenated follicles on either arm while the secondary outcomes were the number of LUFs and pregnancy rates. Data obtained including demographics were extracted using a proforma.

Statistical Analysis

The Statistical analysis was performed using the Statistical Package for the Social Sciences version 21.0 software (SPSS Inc., Chicago, IL, United States). The results were expressed as mean±standard devaition (SD). Odds ratios and 95% confidence intervals were calculated. Chi-squared test and Fisher’s-exact test was used at an appropriate place to calculate the p-value. The p-value was considered significant at <0.05.


Fifty women completed the study in each arm of the study. (Table/Fig 1) shows the age and parity distribution of the women. There was no significant difference between the two arms. (Table/Fig 2) shows the general clinical characteristics of the women. There was no significance difference between the period of infertility and the number of the previous cycles of ovulation stimulation (p=0.444 and 0.526 respectively). (Table/Fig 3) shows the association between ovulation and HCG injection. The table shows that ovulation is significantly associated with HCG injection. While 40 (80%) of the HCG arm ovulated, 25 (50%) of the no HCG arm ovulated (p=0.001). However, there was no statistical significance between both arms as regards the number of LUF (p=0.216). (Table/Fig 4) shows that HCG injection is significantly associated with pregnancy. Subjects who had HCG injection were over two times more likely to become pregnant than those without HCG injection (OR=2.488, 95% CI for OR=1.057-5.857, p=0.037). (Table/Fig 5) shows the mode of insemination among ovulation subjects between HCG and no HCG groups.

(Table/Fig 6) shows the mode of conception amongst the pregnant women in the two arms with timed intercourse contributing to more pregnancies in the HCG arm (54.5%) and IUI in the no HCG arm (83.3%).


Infertility has become the commonest reason for gynaecological clinic attendance in our environment (17); and with an increase in the age of marriage amongst women, anovulatory infertility is on the rise. Infertility due to anovulation affects all age groups and parity as there is no statistical difference among the two study groups as regards age and parity. Ovulation rate was obviously higher in the group that received HCG injection compared to those that did not receive the injection. The ovulation rate of 80% was very significantly higher than the ovulation rate of 50% in the LE only group. A similar study amongst women with polycystic ovary had an ovulation rate of 52.4% amongst the LE group; but, when LE was combined with Human Menopausal Gonadotrophin, ovulation rate increased to 65.3% (18).

Despite the assumed superiority of LE to CC in ovulation induction, CC was shown to have ovulation rate of 60-85% when used with HCG (6) which is comparable to the ovulation rate of 80% for our study where LE was used. Our study despite higher ovulation rate showed no statistical difference in LUF rate among those that received or didn’t receive HCG injection. Previous study showed increased LUF in cycles in which HCG injection was not given; though this was had women with Polycystic Ovarian Syndrome (18). The pregnancy rate from our study was 44%. This is statistically higher than the rate in no HCG group. This was also higher than the rate in two other studies where pregnancy rates were 14.4% (6) and 26.51% (19). The high rate may be as a result of stricter patient selection in our study. The 44% pregnancy rate was however lower than the 55.7% in another study (19).

Most of the pregnancies in the HCG group was due to timed intercourse (54.5%), whereas, in the no HCG group it was as a result of IUI (83.3%). The clinical significance of this is not clear. However, this study with a large number of women contributes to the body of knowledge especially from the perspective of an African population.


The present study was limited by it's non randomised study design.


This study showed that both the ovulation rate and pregnancy rate are significantly improved when human chorionic gonadotrophin injection was given after ovarian stimulation with LE. It is recommended that HCG injection can be added in cycles of ovarian stimulation with LE to improve ovulation and pregnancy rates.


Dankert T, Kremer JA, Cohlen BJ, Hamilton CJ, Pasker-de Jong PC, Straatman H, et al. A randomised clinical trial of clomiphene citrate versus low dose recombinant FSH for ovarian hyperstimulation in intrauterine insemination cycles for unexplained and male subfertility. Hum Reprod. 2007;22(3):792-97. Doi: 10.1093/humrep/del441. [crossref] [PubMed]
Kar S. Clomiphene citrate or letrozole as first-line ovulation induction drug in infertile PCOS women: A prospective randomised trial. J Hum Reprod Sci. 2012;5(3):262-65. Doi: 10.4103/0974-1208.106338. [crossref] [PubMed]
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Fisher SA, Reid RL, Van Vugt DA, Casper RF. A randomised double-blind comparison of the effects of clomiphene citrate and the aromatase inhibitor letrozole on ovulatory function in normal women. Fertil Steril. 2002;78(2):280-85. Doi: 10.1016/s0015-0282(02)03241-7. [crossref]
Nakamura Y, Ono M, Yoshida Y, Sugino N, Ueda K, Kato H. Effects of clomiphene citrate on the endometrial thickness and echogenic pattern of the endometrium. Fertil Steril. 1997;67(2):256-60. Doi: 10.1016/S0015-0282(97)81907-3. [crossref]
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DOI and Others


Date of Submission: Jul 06, 2020
Date of Peer Review: Sep 08, 2020
Date of Acceptance: May 04, 2021
Date of Publishing: Jul 01, 2021

• Financial or Other Competing Interests: None
• Was Ethics Committee Approval obtained for this study? Yes
• Was informed consent obtained from the subjects involved in the study? Yes
• For any images presented appropriate consent has been obtained from the subjects. NA

• Plagiarism X-checker: Jul 07, 2020
• Manual Googling: May 03, 2021
• iThenticate Software: Jun 10, 2021 (17%)

ETYMOLOGY: Author Origin

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