Regarding monozygotic twins, which of the following is not true?
Ans: C (Always monochorionic) Ref: DC Du f fa's Textbook of Obstetrics, 7th edn, Pg 201Explanation:Monozygotic twins are always identical in sex.Monozygotic twins can be:Diamniotic dichorionicDiamniotic monochorionicMonoamniotic monochorionicConjoint twinsMost common cause of multiple pregnanciesovulation inductionUltrasound in the first half of pregnancy is best to check for amnionitis and chorionicity.
USG is more useful in the first half of pregnancy
Sex discordance can occur rarely
Always monochoriomc
More common following ovulation induction