The 1st prenatal examination to look at is diagnosing a twin pregnancy. Study indicates that as much as 40% of twin pregnancies aren't diagnosed right up until the 13th 7 days of pregnancy. An ultrasound can ascertain if twin toddlers are similar or fraternal. This is named heteropaternal superfecundation — https://sociallweb.com/story5748172/everything-about-hcbs-twin-horizon