What are some indications for antenatal testing in twins?

In the context of assessing the need for antenatal testing in twins, there are several important factors to consider that can indicate the necessity for such interventions. Fetal Growth Restriction (FGR) in either twin is a significant concern because it can lead to poorer outcomes if not monitored and managed appropriately. The presence of oligohydramnios, which refers to low amniotic fluid levels, can also warrant closer monitoring, as it may indicate issues with placental insufficiency or fetal well-being.

Monochorionicity, or the condition where twins share a single placenta, is particularly critical, as this arrangement is associated with a higher risk of complications such as twin-to-twin transfusion syndrome and should be managed with increased surveillance. Thus, the combination of FGR, oligohydramnios, or monochorionicity serves as strong indications for antenatal testing in twin pregnancies to ensure both fetal health and timely intervention if necessary.

In contrast, solely considering maternal age is not adequate for determining the need for antenatal testing, as age alone does not address specific fetal risks. Observing a single fetal demise, while significant, typically warrants a different clinical approach, focusing on the surviving twin rather than routine antenatal testing for both twins.