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1558 Gynaecology & Obstetrics

A 16-year-old female has not yet staed having menstrual cycles. Her secondary sex characteristics appear normal as does external examination of her genitalia. She is given an intramuscular injection of progesterone and 5 days later she has her first period. The mechanism responsible for the delay in menses is :-

AHypoestronism
BHypopituitarism
CAn end-organ abnormality
DA normal constitutional delay in menarche
Gynaecology & Obstetrics
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1563 Gynaecology & Obstetrics

Superfecundation is?

AFertilization of an ovum by an insemination that takes place after one ovum has already been fertilized
BFertilization and subsequent development of an ovum when a fetus is already present in the uterus
CThe presence of two separate embryos in one amniotic sac
DNone of the above
Gynaecology & Obstetrics
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