Single-celled living organisms, some of which can trigger infections in the reproductive system.

Basal Body Temperature (BBT)

The lowest body temperature during the day (usually early morning). For a woman, the BBT has a pattern of being lower than normal prior to ovulation and higher than normal after ovulation.


A small sample of body tissue removed for microscopic examination.

Blastocyst transfer

A recent advance in infertility treatment, in which embryos develop for 4 or 5 days (until they reach blastocyst stage), rather than the usual 2 or 3 days in IVF.

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