11 weeks pregnant baby stable?

Embryo cell development critical period is menstrual stop 6-10 weeks, during this period if affected by toxic and harmful factors outside, will show abnormal embryonic development, so easy to produce embryo stop development during this period. After 11 weeks of pregnancy, placenta has formed, can secrete enough progesterone, so the fetus is generally relatively stable, showing abnormal possibility will decline. But still need regular check-up, because there are some fetal abnormalities, must be extended with the gestational age to show, so still need to check on time. The above health science knowledge is for reference only, the specific situation needs to be checked in a regular hospital, judged by a professional doctor.