Original URL: http://pregnancy.familyeducation.com/first-
trimester/day-3.html   First Trimester 2nd Trimester     3rd
Trimester    277 days to go...   When you're trying to get
pregnant, it helps to be aware of lifestyle and medical factors
that can affect your menstrual cycle.  You may notice the timing
and volume of your period differs. Your menstrual cycle can be
affected by stress as well as by medical conditions, such as an
overactive thyroid. In both these cases, periods can become
lighter or less frequent. If your periods are erratic, it can be
difficult to predict when you might ovulate. Unpredictable or
missed periods may mean that ovulation isn't occurring at all.
If you know this to be the case because you're monitoring the
signs of ovulation (see Are you ovulating?), or using ovulation
predictor tests (see This is Day 8 of your Menstrual Cycle),
seek medical advice about your fertility.  You may be able to
become pregnant naturally and easily despite problems related to
your period, but some condi