Blastocyst culturing is a technique to grow embryos beyond the third day of culture. Typically, we transfer embryos into the uterus about three days after the egg retrieval, which is several days earlier than would occur in nature. On the third day, embryos generally are between six to eight cells. We now have the ability to keep the embryos two additional days in a culturing material before implanting in the uterus. During this additional culture period, the embryos continue to grow to become "blastocysts."

In approximately 50% of the cases of anovulation, the ovaries do not produce normal follicles inwhich the eggs can mature.  Ovulation is rare if the eggs are immature and the chance of fertilization becomes almost nonexistent.  Polycystic ovary syndrome, the most common disorder responsible for this problem, includes symptoms such as amenorrhoea, hirsutism, anovulation and infertility.  This syndrome is characterized by a reduced production of FSH, and normal or increased levels of LH, oestrogen and testosterone.  The current hypothesis is that the suppression of FSH associated with this condition causes only partial development of ovarian follicles, and follicular cysts can be detected in an ultrasound scan.  The affected ovary often becomes surrounded with a smooth white capsule and is double its normal size.  The increased level of oestrogen raises the risk of breast cancer.
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Some people can immediately feel the difference in their hormones (even though they may not know this is what it is) when they engage in exercise. The mood improves, they sleep better and they may even experience an increase in their sexual appetite. All of these changes occur with changes in hormones. For example, we often hear about the “feel good hormone” serotonin increasing with exercise.