Login
Родить девочку
5516 просмотров
Перейти к просмотру всей ветки
Zelenyuk коренной житель
in Antwort Zelenyuk 03.11.11 19:50, Zuletzt geändert 03.11.11 20:07 (Zelenyuk)
Psychological stress related to severe life events may alter the sex ratio through changes in sexual activity, changes in hormones around the time of conception (3), reduced semen quality (2, 4), or an increased rate of early male abortion (5).
2 - Fukuda M, Fukuda K, Shimizu T, Møller H. Decline in sex ratio at birth after Kobe earthquake. Human Reprod 1998;13:23212.
3 - James WH. Evidence that mammalian sex ratios at birth are partially controlled by parental hormones levels at the time of conception. J Theor Biol 1996;180:27186.
4 - Fenster L, Katz DF, Wyrobek AJ, Pieper C, Rempel DM, Oman D, et al. Effects of psychological stress on human semen quality. J Androl
1997;18:194202.
5 Pratt NC, Lisk RD. Effects of social stress during early pregnancy on litter size and sex ratio in the golden hamster (Mesocricetus auratus). J Reprod
Fert 1989;87:73669.
2 - Fukuda M, Fukuda K, Shimizu T, Møller H. Decline in sex ratio at birth after Kobe earthquake. Human Reprod 1998;13:23212.
3 - James WH. Evidence that mammalian sex ratios at birth are partially controlled by parental hormones levels at the time of conception. J Theor Biol 1996;180:27186.
4 - Fenster L, Katz DF, Wyrobek AJ, Pieper C, Rempel DM, Oman D, et al. Effects of psychological stress on human semen quality. J Androl
1997;18:194202.
5 Pratt NC, Lisk RD. Effects of social stress during early pregnancy on litter size and sex ratio in the golden hamster (Mesocricetus auratus). J Reprod
Fert 1989;87:73669.