Fertilization and Embryo Development of Fresh and Cryopreserved Sibling Oocytes

Document Type : Original Article


1 Toronto Centre for Advanced Reproductive Technology, TCART , Toronto, Canada

2 Division of Reproductive Sciences, University of Toronto, Toronto, Canada

3 Institute for Medical Science, University of Toronto, Toronto, Canada


The pattern of Islamic fasting differs from other forms of fasting, therefore its effect on health also differs. This research studies the effect of Islamic fasting on gonadotropin hormones around the time of the ovulatory cycle and ovulation.

Materials and methods
This self-controlled study was performed on 24 adult females. Blood sampling was performed during Ramadan and two months later to determine the levels of follicle stimulating hormone (FSH), luteinizing hormone (LH), estrogen and progesterone. Ultrasonography was done in order to detect ovulation and the results were compared.

The mean values of FSH, LH and estrogen during the 14th day of menstruation were comparable with non-fasting values. There was no significant difference in ovulation.

Islamic fasting causes neither significant variation in hormone secretion around ovulation nor does it influence the occurrence of ovulation.