Why does a woman's sense of smell change when she's pregnant?
Many women experience a heightened sense of smell during pregnancy, mainly due to an increase in the pregnancy hormone oestrogen. Some researchers believe sensitivity to odours and taste cause morning sickness – thereby rejecting foods containing chemicals or toxins harmful to the foetus.
What smells are more tolerable?
Aromatherapy suggests relieving feelings of nausea with the scent of peppermint, spearmint, lime, lemon and ginger. Ginger is a time-honoured digestive treatment in herbal medicine and is used widely as a natural remedy for nausea and vomiting in pregnancy, while chamomile, lavender, rose and sandalwood can be very relaxing.