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hCG is secreted by the trophoblast soon after implantation and is the hormone detected by pregnancy tests.
Ref: NCERT Class 12 Biology Chapter 2: Human Reproduction Menstrual Cycle Fertilization Implantation Pregnancy Parturition Lactation
hCG, secreted by the trophoblast, maintains the corpus luteum and ensures continued progesterone production during early pregnancy.
Ref: NCERT Class 12 Biology Chapter 2: Human Reproduction Menstrual Cycle Fertilization Implantation Pregnancy Parturition Lactation
During pregnancy, the placenta secretes progesterone, which helps maintain the uterine lining and prevent contractions.
Ref: NCERT Class 11 Biology Chapter 19: Chemical Coordination and Integration Mechanism of Hormone Action - Second Messengers
hCG is secreted by the placenta and helps maintain the corpus luteum during early pregnancy.
Ref: NCERT Class 11 Biology Chapter 19: Chemical Coordination and Integration Gonads - Testis and Ovary Hormones
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