Wow. Please share your thoughts.
As a woman who gave birth to a 10lb 5oz baby via C-section, I would have to think very hard about using Metformin for future pregnancies. I gained an appropriate 25 pounds during my pregnancy and didn't think twice about having a big baby until a routine ultrasound at 40 weeks showed macrosomia. My diabetes screenings came back fine. I was planning to deliver at a birth center with a midwife, but the midwives were very uneasy about delivering a big baby. After about 6 hours of laboring at the center, I was transferred to the hospital because the baby wasn't descending - I was dilated to 4 cm. In the hospital, I dilated to 7cm while the baby remained at -5 station. At that point I was told that he was too big to be born vaginally and a cesarean was ordered. My son was born healthy and his blood sugars also tested normal. He's now a gigantic 25 pound, 31" tall 8-month-old. Most people think he's closer to 18 months based on his size. Perhaps he's just destined to be a big boy!
I very much want a healthy baby and a natural birth. If Metformin would make it more likely I'd have an average-sized baby in the future and there were no other side-effects, I'd gladly take it. Unfortunately, we have no such guarantees. I would prefer to teach my children healthy diet and exercise habits to avoid becoming obese later in life rather than subject them to unnecessary medications in the womb.