Substances to cross placenta || umbilical cord || gestation period || teratogens || parturition || lactation

Gestation Period|Parturition|Lactation

State the role of (a) placenta and (b) umbilical cord in the development of the foetus

Male Reproduction System|Female Reproduction System|Menstrual Cycle|Fertilisation|Implantation|Gestation, Parturition And Lactation

In lactational amenorrhoea, there is no ovulation or menstruation during the period of intense lactation following parturition, due to high level of protactin, which?

Human Placenta Introduction Development Functions OF Placenta Hormones Secreted By Placenta Substances And Pathogens That Croos Placental Barrier Umbilical Cord And Umbilical Vessels Feto-meternal Circulation

A : placenta is connected to the embryo through an umbilical cord which helps in the transport of substance to and from the embryo R : Palcenta acts as an endocrine tissue

Read following statements (a-d) and choose the option with only correct statements. a. Parturition occurs due to a complex neuroendocrine mechanism at the end of gestation period. b. The signals for parturition originate from fully developed foetus and placenta which induces mild uterine contraction. c. Foetal ejection reflex triggers release of oxytocin from foetal pituitary. d. Oxytocin reduces uterine contraction under positive feedback control and causes expulsion of placenta followed by foetus known as parturition. a and b b and c c and d a and d

Assertion: Parturition is induced by neural signal in maternal pituitary. Reason: At the end of gestation period, the maternal pituitary releases prolactin which causes uterine contractions.