胎 is built from the 月 and 台 components.
It reads タイ like 台, as do 怠 — learn 台 once and the family's reading comes with it.
A common word using 胎 is 胎内 (たいない), meaning “interior of the womb (of a pregnant woman); interior of the uterus”.
Kanji that look similar include 削, 前, 肺, and 胃.