Quick Answer. BabyMed claims that changes to the cervix do not always occur until several weeks or months after a woman becomes pregnant. Accordingly, the cervix does not feel different at four weeks for most women. A cervix normally moves down after ovulation, but it moves back up if a woman is not pregnant. Continue Reading.
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Tacan stands for Tactical Air Navigation and is a system which, working in the u.h.f. band, between 962 and 1,214 Mc/s, gives to a pilot continuous information as to his range and bearing from a beacon.