<prompt> tafadhali geuza maudhui haya ya swahili kwenda kwa kiingereza.utafiti umedhihirisha kuwa kuna tofauti kubwa katika nambari ya mimba kati ya wanandoa wanaofanya ngono kila siku katika kipindi chao cha uzazi mkubwa asilimia 37 ikilinganishwa na wanandoa walio fanya ngono baada ya siku moja asilimia 33.  <response>: research has shown that there hasnt been a big difference in pregnancy rates between couples who had sex every day during the fertile window 37 percent compared with couples who did it every other day 33 percent, turner said. 