Foetal heart slow at 16 weeks

A foetal heart rate anywhere between 120 and 160 is considered normal at any time during pregnancy. The best indicator of foetal well-being during pregnancy is appropriate growth. The uterus is generally approximately halfway between the umbilicus and the pubic bone at this time.

A rare problem such as ‘heart block’ may cause a slow foetal heartbeat but it is generally slower than 100 and is rarely evident this early.

I would try not to worry unless there are other signs, such as slow growth of the uterus.

I hope this reassures you — try not to worry.

Peg