Want better sex, dads? Then take paternity leave

The first wave of the gender revolution destabilised relationships, but the second wave can be their saviour

New studies link pollution to a variety of health risks

A raft of recent studies detail how air pollution might be linked to ailments from severe flu to ADHD

Men don’t worry about their sperm count – but they should

Male fertility in the west is in crisis. But, thanks to a lack of anxiety among men, we haven’t yet taken the problem seriously

Female embryos more likely to die in pregnancy than males, study claims

Analysis of 140,000 embryos contradicts belief that male babies are more vulnerable and suggests mortality rate for females is higher overall

I’m not a ‘Nipple Nazi’, I’m a breastfeeding counsellor

My role is to support women who want to breastfeed, and respecting a woman’s choice not to. Because they’re her breasts

Buying human breast milk online poses serious health risk, say experts

Researchers call for regulation of internet sales of breast milk, boosted by demand from mothers unable to breastfeed, bodybuilders and fetishists

Leave Gwyneth Paltrow alone! Her website gives me joy

All this criticism of Gwyneth Paltrow and her website, Goop, rests on the false notion that we should only accept wisdom from the broken

Indian civil servants to get free daily yoga lessons

Classes for officials and their families follows introduction of compulsory yoga for India’s police and defence forces

The key to our happiness is connection, not competition

Schools and workplaces encourage our selfish side, but research suggests this attitude is counterproductive to our wellbeing

International Day of Happiness: the songs that lift your spirits

At the start of this week, we asked you what songs made you happy – and to celebrate today’s official day of global joy, we’ve made a playlist of some of your best and most unusual choices