The physicians refer to the age of a pregnancy as lunar months. The lunar months corresponds to the usual length of the menstrual cycle, in this respect, it is easier to calculate. A lunar month is a period of four weeks (28 days) and a trimester is a time period of 3 months.
Lunar Months
One lunar month is made up of 29.5 days. Another way to determine your due date, more accurately, is by lunar months. Most pregnancies will last just under 10 lunar months from day one of their last menstruation.
But how accurate are they, really? Some claim that using a Chinese gender calendar can be up to 93 percent accurate in predicting your baby's sex. And because it's based on your age and the month you conceived, you can consult the chart at any point during your pregnancy.
Normally, your due date is 280 days (40 weeks or about 10 months -- also known as 10 lunar months) from the first day of your last period.
The month of pregnancy is the month of conception in lunar calendar, not the month of the last menstruation. If she conceives in a leap month, the first half of the month is counted in the previous month and the second half is counted in the next month.
A recent study found that ovulation occurs, on average, 12.4 days before menses onset. If menstruation starts near the full moon, women's most fertile phase would occur near the new moon.
Tradition has it that if ovulation and conception occur on a full or crescent moon, you are more likely to be carrying a girl.
First Trimester (0 to 13 Weeks)
The first trimester is the most crucial to your baby's development. During this period, your baby's body structure and organ systems develop. Most miscarriages and birth defects occur during this period. Your body also undergoes major changes during the first trimester.
What pregnancy trimester is the longest? The third trimester is considered to be the longest trimester of pregnancy. This trimester begins in week 28 of pregnancy and lasts until you give birth. Most women begin labor around week 40 of pregnancy, while some pregnancies may take longer.
Contrary to popular belief, pregnancy does not start at conception. So, when does pregnancy start counting? The pregnancy timeline actually starts on the first day of your last menstrual period (LMP). This means that pregnancy actually ends up being 40 weeks or 10 months long!
The physicians refer to the age of a pregnancy as lunar months. The lunar months corresponds to the usual length of the menstrual cycle, in this respect, it is easier to calculate. A lunar month is a period of four weeks (28 days) and a trimester is a time period of 3 months.
When the moon moves into a line with the earth and the sun, it comes the first day of the lunar month. When the moon is full, it comes the middle of the month. So there are 29 or 30 days in a month. There are 12 or 13 months in a lunar year.
Pregnancy usually lasts about 40 weeks (280 days) from the first day of your last menstrual period (also called LMP) to your due date.
More than 90% are born two weeks either side of the predicted date. But, as noted above, only 4% (or 4.4%, ignoring pregnancies with complications etc) are born on the predicted date itself - in other words, the chance of this happening is less than one in 20.
James Elgin Gill was born in Ottawa, Ontario, on May 20, 1987, around 128 days early or 21 weeks gestation. He set a record when he was born for the world's most premature baby.
The first trimester is the most fragile period. It's when all major organs and systems are formed. Most birth defects and miscarriages happen during the first trimester. In the second and third trimester, the fetus is fully formed and grows and matures rapidly.
Many women choose to delay announcing a pregnancy at least until the end of the first trimester (12 weeks into their pregnancy). This is usually because of concerns about the risk of miscarriage (pregnancy loss) during this time.
Most people find the first six to eight weeks to be the hardest with a new baby. And, although people may not openly discuss many of the challenges in these early weeks of parenthood (if at all), there are a number of common hurdles you may face at this time.
Most babies (91%) in Australia are born at term (37–41 weeks). This is similar across the states and territories and has been stable over time.
Certain uterine conditions or weak cervical tissues (incompetent cervix) might increase the risk of miscarriage. Smoking, alcohol and illicit drugs. Women who smoke during pregnancy have a greater risk of miscarriage than do nonsmokers. Heavy alcohol use and illicit drug use also increase the risk of miscarriage.
A: The so called Luna, half moon, or sickle of the moon, also waning and waxing moon, is a sign of fertility, related to life and death, and thus a popular symbol in many religions. It pinpoints changing seasons, ebb and tide (and related inundations as harbingers of fertility), and the feminine menstrual cycle.
Though nobody can be sure of when a baby will be born, some Moon lore suggests that births are more likely to occur 7 days before through 7 days after a Full Moon. In fact, many cultures believe that the full Moon's pull on a woman's amniotic fluids increases the chances of giving birth at this time.