How about the First and Second trimester? Over 90% of abortions occur in the early part of the First trimester. OBGYN physicians consider abortions during the third trimester dangerous for the women. Those are only done if the unborn is deformed, is likely to die, or has already done so. It is to protect the mother. But Roe. V. Wade makes abortion legal in the first and second trimesters. It is a Federal Law, those parts cannot be changed by the States.