MCQ – 89054


A 26-year-old woman comes to the physician because she has not had a menstrual period for 5 weeks. Menarche was at the age of 14 years and menses occurred at regular 30-day intervals. She reports having unprotected sexual intercourse 3 weeks ago. A urine pregnancy test is positive. Which of the following best describes the stage of development of the embryo at this time?

A. Sexual differentiation has begun, but fetal movement has not started


Fetal heart is beating, but cardiac activity is not yet visible on ultrasound


Neural crest has formed, but limb buds have not yet formed


Limb buds have formed, but fetal movements have not begun

Show Answer

Leave a Reply