thely- (Greek: feminine, female, females; daughter, daughters).thelygenous: 
Giving birth only, or mostly, to daughters.
 
thelygenus: 
A father who begets only, or mostly, daughters.
 
thelypara: 
A mother who bears only, or mostly, daughters.
 
thelyparous: 
Bearing only, or mostly, daughters.
 
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