Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
Comment
. 2001 Mar 10;322(7286):617.

The fragile male. Male zygotes are often formed at suboptimal times in fertile cycle

W H James
Comment

The fragile male. Male zygotes are often formed at suboptimal times in fertile cycle

W H James. BMJ. .
No abstract available

PubMed Disclaimer

Comment on

References

    1. Kraemer S. The fragile male. BMJ. 2000;321:1609–1612. . (23-30 December.) - PMC - PubMed
    1. Wilcox AJ, Dunson D, Baird DD. The timing of the “fertile window” in the menstrual cycle: day specific estimates from a prospective study. BMJ. 2000;321:1259–1262. . (18 November.) - PMC - PubMed
    1. James WH. Analysing data on the sex ratio of human births by cycle day of conception. Hum Reprod. 2000;15:1206–1207. - PubMed
    1. James WH. Why are boys more likely to be preterm than girls? And other related conundrums in human reproduction. Hum Reprod. 2000;15:2108–2111. - PubMed
    1. Gray RH, Simpson JL, Kambic RT, Queenan JT, Mena P, Perez A, et al. Timing of conception and the risk of spontaneous abortion among pregnancies occurring during the use of natural family planning. Am J Obstet Gynecol. 1995;172:1567–1572. - PubMed