000 00795 a2200277 4500
005 20250511235610.0
264 0 _c19900828
008 199008s 0 0 eng d
022 _a0018-7143
040 _aNLM
_beng
_cNLM
100 1 _aBernstein, M E
245 0 0 _aVariation of primary and secondary mammalian sex ratio.
_h[electronic resource]
260 _bHuman biology
_cJun 1990
300 _a437-43 p.
_bdigital
500 _aPublication Type: Letter
650 0 4 _aAbortion, Spontaneous
_xepidemiology
650 0 4 _aAnimals
650 0 4 _aFemale
650 0 4 _aHumans
650 0 4 _aInsemination, Artificial
650 0 4 _aMale
650 0 4 _aPregnancy
650 0 4 _aSex Ratio
650 0 4 _aSpermatozoa
_xanalysis
773 0 _tHuman biology
_gvol. 62
_gno. 3
_gp. 437-43
999 _c2379586
_d2379586