There is unfortunately always attrition at every stage of the process. The number of eggs retrieved is almost always smaller than the number of follicles on the pre-retrieval ultrasound. Some oocytes will be immature and not used in IVF. Some of the injected oocytes do not fertilize and some of those that are fertilized will not develop. 

No, it can not, because follicles do not have progesterone receptors.  Read more

It may be. However, estradiol, just like the size of the follicle only represents the property of the follicle, but not the quality of the oocyte. Read more 

No, just like any other procedure it has indications and counter-indications and must be considered within the context of the patient’s history. Read more

Yes, abnormal sperm morphology does not by itself mean infertility or even subfertility. Infertility can only be diagnosed within the context of a patient’s history. Read more

It seems that a man with semen volume between 0.5 and 11 ml may have normal fertility. Read more

If progesterone is moderately elevated and stays below 3 pg/ml, this is usually due to having multiple follicles, each contributing a physiological amount, usually about 0.1 ng/ml. If progesterone is elevated above 3 pg/ml this usually means that one of the follicles has ruptured. This is inconsequential for the remaining follicles. The progesterone elevated above 1.5 ng/ml usually a concern only for a fresh transfer, because it may interfere with implantation. 

Oocyte is much more likely to be chromosomally abnormal than sperm. Read more

PGT testing identifies chromosomally abnormal embryos with nearly 100% accuracy. However, the rate of false positives (normal embryos mistakenly diagnosed as abnormal) is unknown. According to some publications, it can be as high as 30% and varies between different testing laboratories. Read more

No, it is not important and should not be a part of considerations when selecting an embryo. Read more

An oocyte remains viable for fertilization for about 24 hrs after ovulation, but the best time to be fertilized is within 5 hours after ovulation. Read more

No, it is not. The largest follicle does not necessarily contain the best eggs. Read more

According to the theory of Term Maturation, during the shorter cycle an oocyte is not able to attain full metabolic competence. Read more

Not necessarily. According to the theory of term maturation, some oocytes may need more time to attain term maturation than an average follicular phase or patient’s natural follicular phase would provide. Read more

Leave a Reply