Menstrual Hygiene Day the march continued to the National theatre for presentations by primary and secondary schools. May 28 has symbolic meaning. May is the 5th month of the year and women menstruate an average of 5 days every month. Also, the menstrual cycle averages 28 days. Menstrual Hygiene Day Menstrual Hygiene Day (MHD, MH Day in short) is an annual awareness day on May 28 to highlight the importance of good menstrual hygiene management (MHM). It was initiated by the German-based NGO WASH United in 2014 and aims to benefit women and girls worldwide. The 28th was selected to acknowledge that 28
Menstrual synchrony synchrony throughout an inter-birth interval, Power et al. argued that once we take account of birth seasonality – enhancing the effects of menstrual synchrony by clumping fertile cycles within a relatively brief time-window – it emerges that reproductive synchrony can be effective as a female strategy to undermine primate-style sexual monopolization by dominant males. The controversy remains unresolved. Adopting a compromise position, one school of Darwinian thought argues that the human female may once have had adaptive reasons for evolving a 29.5-day menstrual cycle – implying some theoretical potential for synchrony to a lunar clock – but did so in