A Study of Morphology and Histological Features of Various Trimesters of Placenta and to Correlate with Ultrasound
Author(s): Arathi MS*
Placenta derives is basically a Greek and Latin name. The Latin root ''placentas" means a cake; Greek root ''plakios" means flat. Fifty-one placentae were collected from the Department of Obstetrics and Gynaecology, Sree Balaji Medical College and Hospital, Chennai. Of the 51 placentae collected, 27 were from term and 3 from pre-term pregnancies. Remaining 21 included placentae from post-abortion and medical termination of pregnancies of which 9 were from first trimester and 12 were from second trimester. On examination of 30 third trimester placentae revealed an average length, breadth, and thickness of 19cm, 16.5cm and 1.5 cm, respectively. The average volume and weight of second trimester placenta in the present study were 31.1 cc and 116.8 gm. Histologically there were anchoring villi and stem villi were present in III and II trimester placentae. Floating villi and placental septae are present only in third trimester placentae. Nucleated RBC' s and endometrial glands were present in I trimester placentae only.