Immune system alteration identified as key process in the male pregnancy of pipefishes and seahorsesReproduction is still one of the greatest mysteries in nature. Pregnancies are usually carried out by the female sex. Only in pipefishes and seahorses males are the pregnant sex. An international team of scientists led by the GEOMAR Helmholtz Centre for Ocean Research Kiel has deciphered the complex modifications of their immune system that enabled male pregnancy. The results have now been published in Proceedings of the National Academy of Sciences (PNAS).
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