ekrisagesuepiasing ekrisagesuepiasing
  • 19-04-2017
  • Biology
contestada

Normally menstruation occurs when ________.

Respuesta :

elenahutchison
elenahutchison elenahutchison
  • 19-04-2017
blood levels of estrogen and progesterone decrease
Answer Link
23aliviajones
23aliviajones 23aliviajones
  • 20-12-2019

Answer:

An egg is yet to be fertilized.

Explanation:

When an egg is not fertilized, menstruation occurs.

Answer Link

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