Early Delivery But Safe

Hello Momshies, May I ask, anong week pwede manganak pero safe? Yun ba ung 6months and 7months? Basta wag lang 8? What's the difference or red tags between them? In my experience. 39weeks induce ako with my 3rd baby. Ngayon. I am wondering sana mas maaga pero pasok sa 9months, like 36weeks. Englighten me please. Thanks!