By: Leonard F. Blackwell; Pilar Vigil; Maria Elena Alliende; Simon Brown; Mario Festin; Delwyn, G. Cooke
Abstract
Introduction: Do the basal body temperature (BBT) shift and the cervical mucus markers for the beginning of the post-ovulatory infertile phase (POIP) of a menstrual cycle agree with the corresponding urinary pregnanediol glucuronide (PdG) threshold value? Perfect agreement between the cervical mucus markers and BBT shift and the hormonal definition of the start of post-ovulatory infertility occurred for only 7-17% of the cycles.
