Hello,
I recently started wearing my Apple Watch again and my heart rate is a quite a bit lower than before pregnancy (usually around 60-70) obviously it went up in pregnancy
Now it is 50-60, when I sleep i recently got low heart rate warning of 44, I've never had this before
Can this be hormonal or related to breastfeeding? It can't be because I'm fitter because I'm definitely less fit now 
has anyone else had similar?