How many times can someone get an abdominoplasty? Can someone have kids again safely after the procedure?

Ultimately, timing of tummy tuck surgery will be a personal decision. As you likely know, if you choose to have a tummy tuck procedure prior to pregnancies, revisionary surgery may be necessary to improve your outcome subsequently. Although impossible to predict, this type of revision surgery may include re approximation of abdominal wall muscles and/or removal of additional skin/adipose tissue.
Your pregnancy will not be affected by the tummy tuck surgery. I would suggest healthy diet and exercise as outlined by your OB/GYN. This will help you maintain a healthy weight throughout pregnancy.

Generally speaking, the “ideal” patient for tummy tuck surgery is one who has completed pregnancies, is psycho socially/emotionally/financially stable, has an excellent social support system surrounding him/her, is capable of arranging enough recovery time, does not smoke and who has reached a long-term stable weight.
Best wishes.

You should be looking forward to your mommy makeover.  If you get pregnant, it is probable that there will be some stretching of the skin and muscles during future pregnancies that may require another tummy procedure to correct.  Although it is best to complete your pregnancies prior to a tummy tuck, over my 26 years of practice, I have had several patients get pregnant after a tummy tuck and have seen some recover fully without further surgery and others that would need some additional procedures.