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2.
A recently coined word used to describe a memory dysfunction in women. It is proposed that the memory lapses experienced by new young mothers, is the result of a hormonal imbalance including repressed estrogen levels and a mammalian hormone called oxytocin.
That young mother is definitely suffering from mom-nesia.
by Guido1 March 06, 2008
 
1.
The amnesia that women begin to experience when they become moms.
Sometimes there's early onset already during pregnancy.
OMG, she left her infant in the car. She's got momnesia.
by Dr. No, Ph.d. May 11, 2009
 
3.
A condition in which memory is disturbed or lost due to having children....
Dialing a phone number and suddenly forgetting who it was you were calling. "I'm sorry, I dialed your number but I have forgotten who it was I was calling due to a bad case of Momnesia"
by Janabanana5 July 15, 2010