Explaining Biology on Instagram: "Twin pregnancies are fascinating because two babies can grow in the same womb in totally different ways 🤯 ✨ Identical twins come from one fertilized egg that splits — same DNA, same genes, sometimes even sharing a placenta . ✨ Fraternal twins come from two eggs and two sperm — basically siblings who just decided to arrive at the same time. Some twins share a placenta, some have their own . Some even develop separate personalities before they’re born. The womb i