Study finds direct correlation between number of eggs at retrieval and pregnancy rate among women above 40
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In August 2010 the Quebec Government funded the costs of in vitro fertilization in exchange for greater use of single embryo transfer. As a result, stimulation protocols became gentler. S. Ouhilal et al sought to determine the optimal number of eggs at oocyte retrieval by carrying out a Cohort study.
Authors compared the number of eggs at oocyte retrieval and the clinical pregnancy rate in all our fresh stimulated cycles between August 2010 and December 2012. The number of eggs at retrieval were divided as follows: 1–4 eggs, 5 to 9 eggs, 10–14 eggs, 15–19 eggs, >20 eggs. Data was subdivided based on age less than 35, age 35-39, and age 40 and over.
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