I really need help understanding how doctors measure how far along in pregnancy you are?...?

Ok so im around 20 weeks pregnant now...i think. I have a question though. The first day of my last period was on JANUARY 1ST.... and me and my boyfriend first had love on the 14th and then everyday for the next 2 weeks.... I went to the doctor to get an ultrasound and she said i was 14 weeks 5 days....welll that diddnt make any sense to me because that time went PAST the first day of my last period.....what does that mean? Are they just estimating based on the size of my baby? I dont get it...

Equine angel asked on 23 May '11 at 16:10

1 Answers


Krish g answer on 19 May '12 at 17:21

Menstruation

Menstruation is a monthly cyclic, physiological shedding of internal lining of uterine cavity due to invisible interplay of female hormones. In simple terms, it is a regular monthly bleeding which a woman experiences. The first menstruation occurs usually at the age of 12 ? 15 years. It is also called as ?menarche?.

Once, the menstruation starts, it continues cyclically at an interval of 22 ? 35 days with a mean of 28 days. Physiologically, it stops during pregnancy and lactation. Ultimately, it ceases between the ages of 45 ? 50 years when menopause sets in. The duration of menstruation (menses) is about 4 ? 5 days and the amount of blood loss is estimated to be 20 ? 80 ml with an average of 50ml. The menstrual discharge consists of mainly a dark altered blood, mucus, vaginal epithelial cell fragments of endometrial, prostaglandin, enzymes and bacteria. Usually, at the mid scale, a mature egg is released (ovulation). If it gets fertilized, the menses ceases. Thus the absence of menstruation suggests that pregnancy has occurred.

 

Fertilization:
Fertilization is a process of meeting (after mating) of the sperm with a mature egg. It begins with sperm egg collision and ends with a formation of life called zygote (single mononucleotide cell mass). The ovum immediately following ovulation is picked up by the fibril end of the fallopian tube and is rapidly transported to the ampullary part of the tube. Out of hundreds of millions of sperms deposited in the vagina after intercourse, only thousand specialized sperms enter the uterine tube while only 300 ? 500 reach the egg. Out of this elite community, only one lucky member is allowed to get into the mature egg. The sperm either contains (22 X) or (22 Y) pattern of chromosomes while the egg contains 22 X only. The love of the child is determined by the pattern of the love chromosome supplied by the sperm. If the sperm contains (22 X) a girl child (46 XX) is formed, if it contains (22 Y) a boy child (46 XY) is formed.

 

Fertile period: 
The fertile period is period around ovulation, during which if relations are kept, the chances of pregnancy are high. In order to improve the chances of pregnancy, it is important to understand how to calculate the fertile period.

Calculation of a fertile period: 

Mark the day 1 of your menses on a calendar. Do this for next 6 -8 cycles. Note the length of the longest cycle and shortest cycle. Subtract 18 from the length of the shortest cycle. Say you get a figure "X" .Subtract 11 from the length of the longest cycle. Say you get a figure "Y". So the period you obtain between "X" and "Y" is the fertile period.

For e.g. your shortest cycle is of 28 days, and the longest cycle is of 30 days. 
28-18=10 
30-11=19 
so your fertile period is from the 10th day to 19th day.

As you know, the ovulation occurs approximately 14+ or -2 days before the next menstrual period. So the highest fertility period is around ovulation time i.e. mid cycle. The life span of the mature egg is approximately 48 hours. while the life span of the sperm is approximately 72 hours. So even when the relations are kept on day 10 or 11 of the menstrual cycle success can be achieved.

Delivery Due Date:

The following chart will help you to estimate when your baby will be due. Pick out the date of your last period from the figures in light type. Your due date is immediately underneath in bold. These dates are all calculated assuming that you have a standard 28 day cycle and the number of weeks also includes the first 2 weeks of your menstrual cycle, when you are technically not pregnant. If your cycle varies from this and you know when you ovulated, just work back 2 weeks from this date to find your last menstrual cycle date (LMP). Please note, it?s your ?estimated? due date . The majority of babies are born within 2 weeks either side of their EDD.       January 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 Oct/Nov 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 1 2 3 4 5 6 7 February 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 Nov/Dec 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 1 2 3 4 5 March 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 Dec/Jan 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 1 2 3 4 5 April 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Jan/Feb 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 1 2 3 4 May 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 Feb/Mar 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 1 2 3 4 5 6 7 June 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Mar/Apr 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 1 2 3 4 5 6 July 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 Apr/May 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 1 2 3 4 5 6 7 August 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 May/Jun 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 1 2 3 4 5 6 7 September 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Jun/Jul 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 1 2 3 4 5 6 7 October 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 Jul/Aug 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 1 2 3 4 5 6 7 November 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Aug/Sept 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 1 2 3 4 5 6 December 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 Sept/Oct 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 1 2 3 4 5 6 7        



Answers of Similar Question


Lorrie answer on 09 May '11 at 18:27

I also had an ectopic pregnancy and yet I got pregnant again within like 9 months! And I was on the Ortho Evra patch at the time. Not saying I never wanted to have kids, but I usually go to school full-time (except for this past Spring semester 2009 where I dropped to part-time) and I'm trying to get my Degree A.S.A.P. cuz I am an older non-traditional student, so time is $$$$. I never had anything but the methotrexate shot. NO surgery whatsoever, fortunately for me. I have never had any STD's. However, for myself what most likely caused my Ectopic pregnancy was the fact I have had endometriosis symptoms since age 15 (which may eventually render me infertile). This condition causes me to vomit every period unless I take an OC or some stronger meds. It also causes severe dymennorhea. This pregnancy (technically my 2nd, but my first child, and also come to think of it, I had no morning sickness the FIRST pregnancy either, lol and I was nearly 8 weeks along when it ended)...I have had no morning sickness (unless you count mild and rare nausea) and that was awesome for a woman whose periods can cause her to throw up at the smell of bacon and other odors, without medication to control it. This time, except for some unexplained bleeding for nearly 2 weeks during my 2nd or 3rd month, which could be because at time I was walking miles and miles each week (I thought, "OH boy, another ectopic?) I was have been doing great and have had no unexplained bleeding since early trimester. I just had a 3rd trimester check-up today and have gained 22 lbs so far. (4 during first trimester, and 5 lbs a month each month beginning at 20 weeks, believe it or not...). Baby is always active and kicking up a storm. He was boxing in his nearly-15-week ULtrasound, lol. Incidentally, I do absolutely no routine exercise this pregnancy since my bedrest for light bleeding. I do get exercise but it's not a routine and it's very much just "around the house" not planned. (I know, not exactly "super-healthy", but I feel like I don't want to overdo after the bleeding and I have a wonderful OB Team of Doctors and Nurses and Staff support so if I need to step it up, I can and will!) Timing is everything. Be in a committed relationship. My husband and I are due to have a boy in a few months. The less stress the body is under the better for your maintaining and keeping a healthy pregnancy. Any questions message me.

Educator4kids answer on 09 May '11 at 22:16

I am right now in the process of my 2nd miscarriage. It is a horrible thing, physically and emotionally. I would not wish this pain on anyone. One in every 5 pregnancies ends in miscarriage, and one in every 4 if you are over 35. A true miscarriage occurs during the first 12 weeks of pregnancy. After that, it is still possible to lose the baby at any time (though the chances are much slimmer). A loss after the first trimester is considered pre-term labor. There are many things women should avoid during pregnancy to protect their little ones. Changing cat litter, soft cheeses, deli meats, certain wrinkle creams- all of these things can be dangerous to the unborn child. For a more detailed list with explanations of their dangers, see ---. This is a list of things you should do and should not do during pregancy and a great source of information. If a miscarriage is happening, there is unfortunately nothing you can do to stop it. The most common cause of early miscarriages is a chromosomal defect that keeps the baby from developing properly. Even if you do everything right and avoid all the things you should avoid, you cannot keep miscarriage from happening if there was a chromosomal defect at conception. Signs of a miscarriage are cramps, lower back pain, pain in the right shoulder (I had this with both of my miscarriages), bleeding, or a brown discharge. That was the first sign for both of mine. Some people will be able to miscarry naturally with no need for d&c, the procedure used to remove all fetal tissue from the uterus. An ultrasound should be performed to be sure all fetal tissue has dissolved or been expelled. If so, you don't need a d&c. If not, the procedure may have to be performed, or the doctor can give you medication to help you expel the rest. Keep in mind that a d&c scrapes out the ining of your uterus, which can make it harder to conceive the next time because the baby may have difficulty implanting. Also, many woman (like myself) have a tilted uterus, which makes it difficult to see the baby in ultrasound, so I recommend waiting a few weeks for another ultrasound before making a decision to have a d&c. See all the miracle stories on ---. No matter which option you choose, your doctor will need to check your HcG levels (the hormone produced during pregnancy) to be sure they get back down to 0. After that, you should wait at least one normal period before trying again. I got pregant the second time 2 weeks after my first miscarriage (I did not wait for the period) and it ended in miscarriage, also, so I highly recommend waiting for that normal period befor trying again. I sincerely hope you never have to worry about any of this, but that should answer your questions. Good luck!

Hoping my little bean sticks answer on 10 May '11 at 03:53

i had this and tested and re tested and nothing. i would suggest going and speaking to your doctor. when i spoke to my doctor they did all kinds of blood test including a hcg (pregnancy) and an ultrasound. although there was no baby they did discover i had pcos and am now being treated for it .. i am also in the 2week wait period so fingers crossed for both of us!

Krish g answer on 20 May '12 at 14:06

Second timester of Pregnancy

Month 4

Mother may feel the baby's first kick during this month. The baby continues to grow and needs more nutrition. The umbilical cord thickens to be able to carry more blood and nutrition. This is also a hazardous period, since any tobacco or drugs may also be transferred to the baby via the same route. The baby is about 7 inches long and has fine hair on her body called 'lanugo'. A mucus-like substance called the 'Verne' begins to cover the baby's body. The love of the baby is now easily determined. The mother's abdomen begins to bulge and she can feel the baby move. Most women go through a period of emotional elation since the presence of the baby is now unmistakably felt. Since the baby seems to respond to sounds, parents tend to start talking to the baby or playing music in the background. This not only helps to soothe them down, but also lays the foundation of future bonding with their child.

 

Tips:

  • Stop taking Folic Acid at 12 weeks unless your doctor says.

  • Blood tests can be done now

  • Amniocentesis can be done from 16 - 18 week

  • Find out about entitlements by contacting Works & Income and/or Inland Revenue

 

 

Month 5

This is a month of rapid growth for the baby. The baby gains maximum length and weight in this month. By the end of the month, she is approximately 30 cm long and weighs almost 400 gm. She becomes very active, moving from side to side and sometimes turning around on her head. The respiratory system starts working and the baby may drink some amniotic fluid. She also begins to urinate. The mother's mood may be better during this month as she feels more energetic than during any other month. Her uterus feels heavy and she may have to take rest frequently during the day. There may be leg cramps, especially during the night.

 

Tips:

  • Likely to have appointment with midwife.

  • Buy maternity clothes especially a maternity bra

  • May have ultrasound scan

 

 

Month 6

This month, the baby's skin has an old wrinkled look to it even though fat deposits under the skin start to form. The baby is too young to be born at this time. Most babies born so prematurely do not survive. Only some who do have to be under intensive care with artificial breathing and precise temperature control in an incubator. The eyes open in this month. Movements become very vigorous and the baby responds perceptibly to sounds. The mother may start feeling uncomfortable because her belly protrudes. She may experience back pain and may have to make some changes in her posture to balance her weight. Most mothers like to sleep on their backs since turning on the side is very uncomfortable. Though the baby by now has quite a regular sleeping pattern, the mother may still be woken up in the night by a vigorous kick. Appetite is still more than normal. Exercise helps to reduce uncomfortable symptoms like back pain.
 

Tips:

  • Start decorating room for baby

  • Check out childcare options if returning to work

  • Hire birthing pool now if you want a water birth