My third child was born while I was in tweets, and about three weeks before track-select when I went through SUPT in the early 90s . Of course, my Flt/CC knew, and accelerated me just enough that I was a little ahead of the timeline when I went on "baby watch" (meaning sims-only beginning with the due date-so the SDO could find me and get me to the hospital on time.) Her due date was a Tuesday. Fortunately, my wife gave birth on Thursday, and went into labor at 5am--so i just took her to the hospital and called the flight room at showtime to report my status. Flt/CC gave me until Tuesday off. On Monday, the mother-in-law arrived, and I was back in the jet the next day. Tip: get a trusted adult (mother, mother-in-law, sister, good friend) to come live with you guys for the week before her due date, and have them stay for ~ two weeks after the birth.