During pregnancy, many women experience an increased sense of smell. Ideally, you mostly smell flowers and freshly baked cookies, as you will likely be more sensitive to all the scents around you.
What is the reason of this?
As with many of the weird, unintuitive symptoms of pregnancy, your hormones are to blame. While progesterone is often the culprit, estrogen is what makes your nose super sensitive for this particular symptom.
Tips
If your increased sense of smell is exacerbating your morning sickness, try cooking only foods you don't get an adverse reaction to, and leave your windows open to reduce strong odors as much as possible. There is nothing you can do to make your sense of smell less powerful, so you can try to reduce the effects of scents by opening windows and using chemical-free candles.

