<prompt> What is Osianders sign?Pulsation in the lateral vaginal fornixBluish colour change in the vaginaSoftening of the cervixOn bimanual palpation the fingers can be approximated as if nothing is in between  <response>: Ans: A Pulsation in the lateral vaginal fornix Ref: DC Duttas Textbook of Obstetrics, 7th ednExplanation:Osianders sign: Increased pulsation felt through the lateral fornices. Felt at 8th week.Jacquemiers or Chadwicks sign: Dusky hue at the vestibule and the anterior vaginal wall. Visible at 8th week.Goodetls sign: Cervix becomes soft. Fell at 6th week.Piskaceks sign: Asymmetrical enlargement of the utenis if there is lateral implantation of the placenta. Fell at 12 weeks.Hegars sign: Variation in consistency of the uterus at 12 weeks.Palmers sign: Regular and rhythmic contractions of uterus demonstrated during bimanual examination at 4-8 weeks. 