Parameters of ovulation in spontaneous ovulatory cycles
Date
1984
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Health & Medical Publishing Group
Abstract
The parameters of ovulation used at the infertility clinic of Tygerberg Hospital were evaluated in 45 spontaneously ovulating women. The mean maximum preovulatory serum oestradiol level was 1,274 pmol/l with a standard deviation of 432 pmol/l and an average daily increase of 245 pmol/l over the last 3 preovulatory days. Normal values were identified for a cervical mucus scoring system similar to the Insler system. The mean midluteal serum progesterone values was 25,5 nmol/l with a standard deviation of 7.5 nmol/l. Ultrasound examinations of the ovaries to diagnose ovulation were used for the first time in Tygerberg Hospital; the average of maximum diameters in three dimensions was used to measure follicles. The average daily pre-ovulatory growth rate was 2.3 mm and the maximum follicle size 20.5 mm with a standard deviation of 2.3 mm. The most common ultrasonic signs of ovulation were reduction in folicle size, development of irregular borders and intrafollicular echoes. In 5 patients endometrial histological dating lagged more than 2 days behind ultrasonic signs of ovulation. These were considered cases of luteal phase insufficiency. The maximum pre-ovulatory serum oestradiol levels were statistically significantly lower in these cases.
Description
The original publication is available at http://www.samj.org.za
CITATION: Van Shouwenburg, J. A. M. H. 1984. Parameters of ovulation in spontaneous ovulatory cycles. South African Medical Journal, 66:567-572.
CITATION: Van Shouwenburg, J. A. M. H. 1984. Parameters of ovulation in spontaneous ovulatory cycles. South African Medical Journal, 66:567-572.
Keywords
Ovulation