Home pregnancy tests can detect HCG around 12 to 14 days after conception, when you're around 4 weeks pregnant – or about the time your period is due. ­ (The most common way to calculate your ...

However, a gestational sac can be identified on transvaginal ultrasound as early as 4.5-5 weeks gestation and a yolk sac is visible on ultrasound by as early as 5 weeks. A fetal pole with heart ...

In general, infants that are born very early are not considered to be viable until after 24 weeks gestation. This means that if you give birth to an infant before they are 24 weeks old, their chance ...