Pregnancy confirms by odour, lemurs are nature's wonders

There are various stupid method used from ancient times when they try to know the sex of an unborn baby inside of mothers womb, some says it can be jugged from the mom who choose between sweet and sour taste or the shape of the stomach, the month during which sperm was fertilized, the change in the habbits during pregnancy period and many more but with today's advanced technologies such as ultrasound which is not always correct to predict the sex of an unborn child.
A report published in the Duke University journal of 25th February 2015 tells us that lemurs are the only know till date specific which can pridect the sex of the unborn child by noticing the difference in the mother's scent which is different for a boy in the womb than from the girl.
A researcher done on 12 cat like primate(lemur) in the Duke University recording the scent of female lemurs before and during the pregnancy period using spectroscopy and gas chromatography and it showed that the scent of female lemur carrying a son has a simpler scent that contains lesser odour compounds than a normal lemur.
The scientists are not confirmed why the lemurs odour becomes simpler when they carry baby sons but they says that it could be done for energy saving as the hormones need for the development of a male child requires more energy and to save this energy the odour becomes less during pregnancy. This research can also help in knowing the sex of humans more accurately and early as compared to today's technology in near future.