So, even if more sex means a higher birth rate, for Japanese women it could mean just more work, and even less free time than they have now. 
Kwa hiyo, hata kama kujamiiana sana kutamaanisha kuongezeka kwa kiwango cha kuzaliana, kwa wanawake wa kijapani, kwao itakuwa ni jukumu mojawapo, na pia kuwa na muda mchache zaidi kuliko walionao kwa wakati huu.