Hair loss is a symptom of this delicate stage in your life. You could experience it during or after pregnancy. But as it is a natural part of things, you shouldn't worry about it and whatever hair loss you've experienced will be replaced by your body as soon as possible.
There are countless products that claim they can help in preventing hair loss and restore your hair to its former glory.
If hair loss is due to medications, the doctor can prescribe drug substitutes. Diabetes and thyroid diseases can also be a cause.