If you are trying to get pregnant, then you need to make sure that you are healthy, in shape and are eating healthy foods. It's also best to begin taken vitamins to improve your immune system and make sure that your baby will be in perfect health. You will want to check for any STD's and get them treated as well.
The first trimester consists of the first thirteen weeks of your pregnancy. This will hopefully give you a idea what will be happening to you and your baby from week.
In week one of your pregnancy you will have you period just like any normal month. In most cases you will not have another period until after the baby is born. There are some cases, however, in which the mother has her period through-out her entire pregnancy, but this is rare. If you do experience bleeding throughout your pregnancy call your doctor immediately.
Your due date is determined by the first day of your last period. Simply subtract seven days from the first day of your period and then add nine months. Since most women don't know when the date of their baby's conception was, this is another way to get a rough idea of when your baby will be due.
In the beginning of the second week, your period has ended and within your uterus there is forming a new endometrium layer in preparation for the baby. Though you are not ovulating yet your body is in the process of "ripening" egg. When you begin to ovulate you estrogen levels will rise and you may feel a lot of energy at this time that you do not other wise feel.
Ovulation takes place in the third week. During ovulation, your body releases more pheromones than usual and you become more attractive to the opposite sex. The ovum (egg) is on its way to the uterus. Though the male may produce any where between 140 and 350 million sperm during intercourse, only about 200 will find it's way to the ovum. Eventually, somewhere between 12 and 24 hours after you ovulate, a sperm makes contact with the egg and still has mobility enough to enter the outer layers of the egg. Thus, begins a new life.
After conception things to protect the baby such as, they glycogen, arterial blood, progesterone levels and water, will build up. With higher level of progesterone your uterus will become less contractible. This will stop your menstrual cycle while you are pregnant.
It will take anywhere from three to seven days more before the egg makes it to the uterus and will "float freely" for a few days more before attaching to the uterine wall. This may cause you to "spot bleed."
You've gotten to week four of your pregnancy. By this time you really want to check with your doctor to see what medications you are allowed so you don't harm the baby. It is said that some women experience a weird (metallic) taste in their mouths. This may be due to the hormone changes, but no one's for sure.
By this time the placenta is beginning to form and your baby is rapidly growing cells called "blastocyst."
In the fifth week you will be able to take a test to see if you are pregnant. If you don't see a positive result, though, don't be discouraged, just try again in about a week. It takes longer for the Human Chorionic Gonadotropin hormone to be detected in some cases.
Some of the symptoms that you may experience in the fifth week are; tender breasts, frequent urination, exhaustion and nausea or vomiting. You've heard the term "morning sickness," but actually not all women feel sick only in the morning. In fact more often than not they feel it throughout the whole day.
Your baby, by this point, is now an embryo and is still not very big at all. He is about 1/16th of an inch long and already the spinal column, brain and heart have begun to develop.
At six weeks along, some women are already noticing a change in tummy size. Some things that are common in the sixth week are your vulva turning slightly bluish or violet due to blood circulation. Also, it's not too uncommon for a woman to faint if she stands to fast or becomes too exhausted so pace yourself. Your sense of smell is heightened and more and more things can spring nausea.
At ½ inch long your baby is now the length of the nail of your small finger. Where his arms and legs are going to be, you can see bumps and the eyes and ears start to become visible. Along with physical features, your baby's heart is now beating.
For the next four weeks your baby will be very vulnerable. It is very important that you watch whatever goes into your body at this point, because something such as smoking or drinking can seriously harm the baby.
Have you ever heard of the "pregnant lady glow?" Well, it's not just a sweet thing that the father says to the mother. By your seventh week the hormones in your skin have taken on a healthy glow.
The baby's heart rate is 150 beats per minute in the seventh week. Hands are developing on the arm and the brain along with other organs are growing. He has made up to 1/3 inch long. At this point though, you still can't tell the sex of the baby.
You're now half way through your first trimester. At eight weeks your breasts have grown larger and your nipples are darker and more pronounced. Your uterus is now twice it's normal size and is probably pressing on your bladder making you urinate more often. Heartburn is also a common symptom. Your baby is still only an inch long, but that's still 10,000 times larger than it was at the time of conception. Genitalia is now distinct and though he cannot open their eyes, the eyeballs themselves are developed. Your baby's arms and legs are now longer and he is moving around and kicking you like crazy.
By week nine you are gaining weight regularly. You need to make sure that you are caring for you teeth and gums properly to prevent tooth loss. The baby goes from being an embryo to being a full-blown fetus, meaning that he has lost his little tail at the base of the spine. This is the week that bones and cartilage begins to form. Also, the umbilical cord and placenta are growing. The baby's fingers are fully developed, but are webbed. The baby also responds to being touched.
In week ten your hormones may be starting to get the best of you. The hormone changes effects your temperature and mood swings. You may find that you feel hot a lot and that your emotions are on a roller coaster. Talk to your doctor to find out how much weight you should be gaining by this point. Light exercise isn't a bad idea either, but make sure and talk to your doctor first.
Your baby is now almost two inches long and still growing and weighs around 1/4 oz. All of his joints are developed and all organs are there, but they're still growing.
It's week eleven and if you are still suffering from morning sickness at this point then it won't be much longer before you're not. Your baby is growing finger nails by this week and will also be developing the irises in the eyes. Your baby will more than likely also double in length by week eleven.
Just two weeks left in your first trimester. You make it to week twelve. Something that may make you happy in this week is your uterus will be turning to take some pressure off your bladder. You're also starting to feel much more energetic. By the twelfth week the placenta is fully functional and produces the needed hormones.
Already by week twelve, your baby is practicing breathing. His chest moves up and down in a "mock breathing." The kidney's are now fully developed and the baby is able to urinate and the intestines are also beginning to contract as if in food digestion.
Now beginning week thirteen, you may be feeling some discomfort around your abdomen. This is because the ligaments that support your uterus are expanding. With the end of morning sickness comes the beginning of the food cravings. Remember to eat "junk food" in moderation even if you are craving it. By this point your nipples are now a lot darker and the veins on your breasts are more defined.
Your baby is still developing and next to develop are the vocal cords. All of your baby's teeth are formed under the gums and the liver and pancreas are even working. He is now able to form red blood cells on his own. On top of this, your baby is even beginning to grow short white hair.
There are still many changes that you and your baby will make during the second and third trimesters, but within the first thirteen weeks of pregnancy you've already made it through some of the most vital times in your baby's development.