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CARS Archives

Is left-sided ovulation significant?
Title: Ovulation side and cycle fecundity: a retrospective analysis of frozen/thawed embryo transfer cycles
Author: I. Jarvela, et al.
Address: Oulu, Finland
Source: Human Reproduction 15:1247-1249 (June) 2000
Summary: A database which covered 477 cycles in which frozen/thawed embryo transfer had been carried out was analyzed retrospectively to evaluate a possible lateral difference in ovarian activity and its effect on cycle fecundity. Cycles were spontaneous, with no hormonal treatment and women with ovulation problems as a reason for infertility treatment were not included. Ovulation was right-sided in 273 of the 477 cycles and left-sided in 204 of the cycles. In the age category of 30-37 years, covering 288 cycles, the incidence of left-sided ovualtion was 126. Also, in this category the endometrial thickness was significantly greater on the day of embryo transfer when there had been left-sided ovulation compared with right-sided. The pregnancy rate per embryo transfer was higher when ovulation had been on the left side vs right side. Researchers concluded that right-sided ovulation was more frequent than left-sided in the whole group. These data support the hypothesis that the side of ovulation is significant in terms of embryo implantation.



 

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