Capt. Squirrel,
Coworker continued flying through two pregnancies to end of second trimester, single pilot medium ship, with blessing of her OB. Became a little uncomfortable towards the end but no problems. Most of our medical staff are ladies and continue their duties almost to term. There are a few accommodations which may make life easier for everyone and some very amusing stories along the way but best kept off a public forum.
Really between the ladies, their physicians and ability to perform required duties.