8w1d ultrasound, doctor said they are Monozygotic but he is concerned about they are sharing same placenta and same amniotic sac. I don’t know anything about twins but they look like they have their own sac to me. Someone with twins knowledge can help?

Cristina • Twins in the oven due march 2020, Mother of 2.5 years old boy, 2 mc, 5 uiu