menstrual age


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menstrual age

[′men·strə·wəl ′āj]
(embryology)
The age of an embryo or fetus calculated from the first day of the mother's last normal menstruation preceding pregnancy.
References in periodicals archive ?
The absolute ultrasound criteria for early pregnancy failure used at the Women and Infants Hospital and in many other settings are no fetal heartbeat in an embryo more than 5 mm in crown-rump length, or menstrual age known to be greater than 6.
This condition takes place only in women of menstrual age, can grow or bleed cyclically and may cause adhesions (1, 2).