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Home / Health News / Study finds father’s genes can impact motherly love

Study finds father’s genes can impact motherly love

The placenta transports nutrients to the growing foetus and gives off hormonal signals in the mother's bloodstream.

By: Editorial Team   | | Published: August 2, 2018 3:08 pm
Tags: Father  Genes  Mother  Newborn  Newborn care  
Father gene
Planning a baby? First, get fit! © Shutterstock

A study has found that a father’s genes can influence the quality of care a newborn receives from its mother. The researchers from Cardiff University in the UK investigated the hormonal signals given off from the placenta during pregnancy. During pregnancy, the placenta transports nutrients to the growing foetus and gives off hormonal signals in the mother’s bloodstream to maintain a successful pregnancy. Also Read - Mother to child transmission of COVID-19 may be a possibility: Here’s what pregnant women must know

As well as throughout the pregnancy it remains involved in nurturing the baby, the placental signals are thought to be important for programming a mother’s behaviour, preparing them for their new role as a parent. These hormones are produced by placental cells called spongiotrophoblasts, whose proliferation, and therefore whose hormone output, is held in check by a gene called Phlda2. Also Read - Newborn fat: Here’s why you shouldn’t ignore it



According to PTI reports, the study which has been published in the journal PLOS Biology reveals that the developing foetus has two copies of the Phlda2 gene, but unlike most genes, only one copy of Phlda2 is active.
This is due to an evolutionarily intriguing phenomenon called genomic imprinting, whereby only the gene copy from one parent is switched on. In the case of Phlda2 it is the father’s copy that is silent. Also Read - First mother-baby COVID-19 vertical transmission recorded in India

Using genetically altered mice, the researchers asked what happened if both copies of the foetus’ Phlda2 gene were active, a “maternalised” condition, or if both were silent, a “paternalised” condition.

According to PTI reports, the researchers found that mothers exposed to pups with the highest Phlda2 activity, and therefore presumably reduced placental hormones, nursed and groomed their pups less and instead focused on nest building.

Conversely, “paternalised” mothers, exposed to the lowest Phlda2 dose, and therefore higher hormone levels, spent more time nurturing their pups, and less on housekeeping tasks.

The researchers also showed corresponding changes in two regions of the mother’s brain -the hypothalamus and hippocampus.

Parenthood can be seen as a conflict between the interests of the two parents, with the father (and his genes) favouring maximum investment in the offspring, potentially at the expense of the mother’s best interests.
The study suggests that the father, by causing his Phlda2 gene to be silent in the foetus, can even affect the nurturing behaviour of the mother after his offspring have been born. The researchers speculate that this may have relevance to humans, as levels of Phlda2 gene activity vary between human pregnancies and inversely correlate with placental hormones.

During gestation, changes in the mother’s priorities and after birth are critically important for the lifelong mental health of the new baby and for their wellbeing.

Image Source: Shutterstock

Published : August 2, 2018 3:08 pm
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