Abstract
An earlier hypothesis, that the greater the antigenic differences between mother and conceptus the greater is the fetal growth-rate, is here extended to explain sex differences in fetal growth-rate in terms of the antigenic disparity created by the presence of a Y chromosome. This effect would be expected in the whole conceptus, and some evidence for this hypothesis can be found in the relative birth-weights of females in mixed-sex multiple pregnancies.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
