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