The 1st prenatal exam to contemplate is diagnosing a twin pregnancy. Research implies that around forty% of twin pregnancies usually are not diagnosed until the 13th week of pregnancy. An ultrasound can figure out if twin toddlers are similar or fraternal. This is called heteropaternal superfecundation — a common prevalence https://bookmarklayer.com/story20281783/the-smart-trick-of-hcbs-sector-102-that-nobody-is-discussing