Which of the following serves as the MOST DIAGNOSTIC sign of Pregnancy?

Ans. C. Foetal heart soundsPresence of fetal heart sounds is considered to be one of the most diagnostic signs of pregnancy.Other absolute signs of pregnancy are mentioned as follows:* Perception of active fetal movements and Palpation of fetal parts.* Ultrasonographic evidence of gestational sac and embryo in early pregnancy and even later.Probable signs:* Osiander's sign (increased pulsation felt through lateral fornix by 8 weeks), Chadwick's sign (Blue hue of vagina), and Goodell sign (softening of cervix)* Enlargement of the abdomen.* Change in shape, size as well as consistency of uterus* Softening of cervix* Internal as well as external ballottement* Contraction of Braxton Hicks