Two systems-menstrual age and fertilization age-are used in signifying the age of embryos.To convert from menstrual age to fertilization age:

Question

Quizplus · Accepted Answer

Menstrual age is typically calculated from the first day of the last menstrual period, which is about 2 weeks before fertilization occurs. Therefore, to convert menstrual age to fertilization age, you subtract 2 weeks.

Two Systems-Menstrual Age and Fertilization Age-Are Used in Signifying the Age