This type of dating is based on averages, as many women ovulate about 14 days after the start of their last period, and expect a new period 14 days after ovulation.
However, the exact day of ovulation can vary from woman to woman and cycle to cycle.
While many mothers are able to see the heartbeat around 6 weeks, some maternity care providers prefer to wait until 7.5 weeks or more.
By waiting until 7-8 weeks, it is less likely that a dating error could lead to not detecting the heartbeat in a healthy pregnancy.
Many women don’t see their midwife or obstetrician until 8-10 weeks of pregnancy, and some health care providers prefer to wait until 13 weeks, when the first trimester is complete.
While an early ultrasound can often detect a heartbeat, it isn’t absolutely necessary in a pregnancy that is progressing properly.
For this reason, the FDA and ACOG recommend that only healthcare providers utilise ultrasound technology, and only as medically necessary.
Later in pregnancy, genetics takes over your baby's growth, and your baby will be measured in terms of percentiles.
So your baby may be on the 30th percentile or the 80th percentile, but still be normal.
Seeing a positive pregnancy test can bring about a host of emotions, thoughts and questions.
One question many mothers have is when can they see their baby’s heartbeat on ultrasound.