How to shut up people who are against abortion

[Rev. Rye]

Here's something that annoys me: pregnancy generally lasts about 40 weeks (give or take 2 weeks, 40 falls on the peak of a nice bell curve). There are 4 weeks each month. A pregnancy lasts 10 months, not 9.
Most pregnancies are uneventful, if uncomfortable the last few weeks. Around 90% of women have completely problem free pregnancies. The births are a different matter entirely.
I'll get off my soap box now.

It's closer to 4 1/2 weeks a month.