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2429 Gynaecology & Obstetrics

Regarding, trophoblast invasion of maternal spiral arteries, all are true except

AFirst wave occurs before 12 weeks and consists of invasion upto border between decidua and myometrium.
BSecond wave occurs between 12 and 16 weeks with invasion of intramyometrial segments of spiral arteries.
CNarrow lumen, muscular spiral arteries are converted into dilated, low resistance vessels.
DInvasion by trophoblasts involves both decidual spiral arteries and decidual veins.
Gynaecology & Obstetrics
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