Woman’s Fertility Maybe Affected by Lifting Heavy Weights and Working Late

September 20, 2017

A new team of researchers from Harvard School of Public Health has published a report suggesting that women who are obese, overweight or above the age of 37 could harm their chances of getting pregnant if they lift heavy loads or work night shifts.


The result of the conducted research can be read in the  Occupational and Environmental Medicine journal. While most moms and soon to be moms are searching on how to lose weight after pregnancy (como emagrecer depois da gravidez), the new study proves that women should not do night-scheduled work and lifting as exercise because it is unhealthy.


The efforts and physiology of over 470 women who were attempting to conceive and then crossed these with four biomarkers produced in their bodies to determine that lifting heavy loads and working night shifts impacts negatively on overweight or obese women’s abilities to get pregnant.


This ongoing research is not the first time such related studies have been carried out, but this finding is the very first to investigate direct biomarkers that determine the ability to conceive in women.

The Four Biomarkers for Fertility

In the course of the research, the scientists examined four biomarkers – estrogen levels in the body, number of mature eggs that could make babies, the level of the hormone that controlled the ability to get pregnant, and the number of immature eggs that could never develop into healthy embryos.


The researchers found out that the more women who are overweight and above the age of 37 engaged in carrying or moving heavy objects and working night shifts, the lesser their abilities to be pregnant. That is because mature eggs for conception will not be developed and they will have lower levels of the hormone, which regulates their reproduction processes. These women were found to have 8.8 percent lesser eggs in total in their bodies and 14.1 percent bad eggs.

No Declarations Yet

More studies are still required to substantiate these findings. The researchers are not yet declaring their final results and still demands more time and research in related fields to support or verify these conclusions. However, it remains that working women whose planning to conceive should be informed about these things so that they could better face challenges related to night shift jobs and moving heavy objects.


Other researchers and scientists are working together, hand in hand, about this important matter. The study headed by the Department of Environmental Health’s researcher Lidia Minguez-Alarcon confirmed that “these occupational exposures are affecting egg production and quality” in women of childbearing age.