Vamwe vakadzi vane siki yokuva nevakomana vakawanda kana kuti vasikana vakawanda here?

Bonde re "fetus" rinopesvedzerwa nemajini, uye zvidzidzo zvakawana kuti kukanganisa kwechromosomal kunogona kukanganisa bonde remwana achangozvarwa.

Mhedzisiro yacho inonyanya kuoneka muvarume.

Mumhuka dzinoyamwisa, masperm anotakura X chromosome anoburitsa vasikana ukuwo masperms anotakura Y anoburitsa vakomana. Saka vabereki vane genetic defects mu X kana Y vanowanzo gadzira murume kana mukadzi.
Ongororo dzinoratidza kuti vanababa vechichena vanobereka vanakomana vanenge 105 pavasikana 100 voga voga, vanababa vomuAfrica vanobereka vanenge 103, nepo vanababa vakuru vachibereka vanasikana vakawanda.

Zvimwe zvinokonzeresa zviripo, semuenzaniso, vanababa vane hepatitis C vane vakomana vakawanda.
Zvichireva, vanenge vakadzi vese vanofanorongerwa kuva nevakomana vakawanda - chiyero chepabonde chevakomana 105 kusvika 100 vasikana chinokanganiswa nesarudzo yemudiwa, iyo ichava neiyo genetic chikamu.

Saka tinogona kutarisira genetic muvakadzi zvakare, kunyangwe vasina simba.