What does a placenta look like

Placental Development

In early human development, the blastocyst typically implants in the upper uterine corpus and contains two cell types.

The outer trophoblast layer will form the placenta. The inner cell mass or embryoblast gives rise to the embryo, amnion, and umbilical cord ( Fig. 19-1 ).

When does placenta take over

Following implantation, trophoblast cells at the embryoblast pole proliferate and become a double layer, each with its own function. The outer syncytiotrophoblast is a multinucleate syncytium that lacks distinct cells. It produces multiple hormones and is responsible for maternal-fetal gas, nutrient, and waste exchange.

In contrast, the inner cytotrophoblasts have distinct cell membranes, are mitotically active, and serve as stem cells for the syncytiotrophoblast.

Is abdominal ultrasound mirrored

During its life cycle, a cytotrophoblast first divides and proliferates. Then later, its cell walls disintegrate, and its contents merge into the expanding syncytiotrophoblast. At day 7 after conception, the syncytiotrophoblast at the embryoblast pole invades the dec

how to find placenta on ultrasound

how to see placenta in ultrasound