I have successfully breastfed my first two children (now 3.5 years and 21 months) until they were each 14 months old. Both were weaned with the intention of re-initiating ovulation for another desired pregnancy. I just found out I am 5 weeks pregnant with our third biological child (yay!). Thrown into the mix is our adoptive son, who is four months old and strictly formula-fed. I have not had the opportunity to attempt breastfeeding with our adoptive son until now (I partially do not regret this, because had I been breastfeeding him, I likely would not have been ovulating to achieve our current pregnancy). So, coincidentally, now that I have the opportunity to attempt breastfeeding with my adoptive son, I am also newly pregnant. FYI (not sure it's relevant): 1) my milk supply with first two children was abundant and pretty much invincible, 2) I've never had a miscarriage, however 3) my first was born at 34 weeks (premature) and I had prodromal labor with #2 from 31 weeks on (born at term).
Should I be concerned about attempting relactation during pregnancy? Would I be at increased risk for miscarriage or preterm birth due to relactation? Thank you for your input.