Sinusoidal hea rate pattern is seen in:: (A) Placenta pre, (B) Vasa pre, (C) Battledore placenta, (D) Succenturiate placenta
Answer is B. Sinusoidal hea rate is observed in the antepaum period due to severe fetal anaemia as in Rh immunisation ,ruptured vasa prae or twin twin transfusion.It is rare in intrapaum period. Refer page no 521 of Text book of obstetrics,sheila balakrishnan,2 nd edition.