Page 3 â Measuring time in different cultures. Measuring time. Scientifically, the year is a complete cycle of seasons. A year is when the earth completes one full orbit of the sun. Its length is measured from one spring equinox to the next spring equinox. Measuring the time of year was important to most people. Knowing the season was vital when deciding to plant and harvest crops as well as managing livestock in colder climates.
Experts have believed for a long time that pregnancy weakens a womanâs immune system, making her more susceptible to illnesses like the flu. However, research released just before the start of this flu season indicates that, in the case of the flu, the opposite may be true during pregnancy.
Anemia during pregnancy can make you feel weak and tired. Know the risk factors, symptoms and what you can do to avoid it. If you're pregnant, you're at an increased risk of iron deficiency anemia, a condition in which you don't have enough healthy red blood cells to carry adequate oxygen to your tissues. Understand why anemia during pregnancy occurs and what you can do about it.