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The lifespan of men and the shape of their placental surface at birth

Record type: Article

Background

Tall men generally lead longer lives than short men. Within the Helsinki Birth Cohort, however, there is a group of boys among whom being tall when they entered school was associated with reduced lifespan. These boys had birthweights and maternal heights above the median for the cohort; but they tended to be lighter at birth than their mother’s body mass index (weight/height2) in pregnancy predicted. We suggested that, while they had grown rapidly in utero, their growth had faltered at some point; and their tallness at age seven was the result of a resumption during infancy of their rapid growth trajectory. We here examine the size and shape of their placentas at birth to gain further insight into their path of fetal growth.

Methods

We examined all cause mortality in the 1217 men who had birthweights and maternal heights above the median for the cohort. Their birth measurements included placental weight and the length and breadth of the placental surface.

Results

Shorter length of the placental surface was associated with increased mortality (p = 0.002). There was no similar trend with the breadth. Mortality rose as the difference between the length and breadth decreased, that is as the surface became rounder. The hazard ratio was 1.10 (1.03–1.18, p = 0.007) for every cm decrease in the difference. Among men with a round placental surface (length-breadth difference 2 cm or less) increased mortality was associated with lower birthweight (p = 0.03 or 0.005 allowing for mother’s body mass index) and shorter gestation, but not with lower head circumference or length.

Conclusion

Reduced lifespan among men is associated with a particular path of early growth. After rapid growth in early gestation, associated with tall maternal stature, soft tissue growth falters in mid-gestation. Rapid growth resumes in late gestation and continues through infancy.

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Citation

Barker, D.J.P., Osmond, C., Thornburg, K.L., Kajantie, E. and Eriksson, J.G. (2011) The lifespan of men and the shape of their placental surface at birth Placenta, 32, (10), pp. 783-787. (doi:10.1016/j.placenta.2011.07.031). (PMID:21831424).

More information

e-pub ahead of print date: 9 August 2011
Published date: October 2011
Keywords: lifespan, fetal growth, placental surface, childhood height
Organisations: Faculty of Medicine

Identifiers

Local EPrints ID: 206335
URI: http://eprints.soton.ac.uk/id/eprint/206335
ISSN: 0143-4004
PURE UUID: 7f63b55b-c25b-45a6-a97f-002c68cb18a0
ORCID for C. Osmond: ORCID iD orcid.org/0000-0002-9054-4655

Catalogue record

Date deposited: 19 Dec 2011 15:03
Last modified: 18 Jul 2017 11:02

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Contributors

Author: D.J.P. Barker
Author: C. Osmond ORCID iD
Author: K.L. Thornburg
Author: E. Kajantie
Author: J.G. Eriksson

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