Table of Contents
The heart is the first organ that begins to function. After 1 month of pregnancy, the heart rate increases. Members and numbers grow in the 2nd month. By the end of the 1st-trimester or 3rd month all major organ systems develop. The genitals are visible. By the 5th month, the embryo begins to move and hair appears on the scalp. By the end of the 2nd trimester (24 weeks or 6 months), eyelashes are formed, eyelids are separated, and the body is covered with fine hair. By the end of the 9th month, the fetus is fully grown and ready for birth.
Introduction
There are several stages of development in the newborn that begin as a fertilized egg and develop into a blastocyst, an embryo, and eventually an embryo. Embryonic development in humans when the course of our life begins with a single cell later dividing into a host of many cells together. The scientific name given to the embryonic development process is called embryogenesis. This is nothing but a process that follows fertilization.
Fertilizer
Fertilization is a process that occurs in the fallopian tubes of the female reproductive system in humans. There is a series of steps that take place before embryonic development.
In one ovary, one egg is released during a normal menstrual cycle about 14 days after menstruation. This is known as ovulation. The mucus in the cervix is very elastic and contains a fluid that allows sperm to enter the uterus during maturation. Fertilization occurs when sperm enters the egg. Cilia are small hairs that look like the lining of the fallopian tube that carries the fertilized egg to the uterus through a tube. It also descends through the fallopian tubes to the uterus and the zygote cells repeatedly divide. Zygote enters the uterus in about 3 to 5 days. Cells continue to divide in the uterus into a blastocyst, an empty ball of cells. About 6 days after fertilization The blastocyst attaches to the wall of the uterus.
Starting of fertilization
The process begins in one of the fallopian tubes when the egg cell is fertilized. The fertilized egg then divides into two consecutive cells. This results in the formation of a ball-shaped structure that contains many cells within it. This ball-shaped structure is called a morula when the cell number is sixteen. This also divides into a structure called Blastula.
Blastula
The blastula is nothing but a stage where cells are arranged in a way that creates the formation of a blank mass. When the cells align themselves they eventually leave a hole inside. This later fills with liquid, the structure will look below.
This is the next phase in embryonic development, this is the stage at which the embryo will separate cells and will differentiate. Separation is the process by which a single cell is separated from the surrounding cells. As a result, we will have a new variety of cells from these different cells once after successive divisions. The Blastocyst stage is nothing but a mass containing these different cells.
Implantation
As the cell grows, the embryo’s body grows larger. In order to thrive and develop, the embryo will need proper nourishment. These foods are found in the mother’s body. The blastocyst needs to be connected to the area where it can receive these nutrients. This is the most important step in the installation process. This is the stage at which the blastocyst attaches itself to the mother’s body in a stable position within the uterus, where it implants itself. This is the place where the baby grows up.
Placenta
The main reason that the embryo attaches itself like this is:
- Getting nutrition
- Garbage disposal
- Exchange of oxygen and carbon dioxide
All of this is provided by the placenta, which is the organ called the placenta. We can say that the placenta connects the baby with the mother. The embryo is ready to grow into a baby.
Fetal Stage
The stage at which the internal organs of a baby begin to develop in such a way that they can be seen is called the fetus. The embryo is now called the fetus. The embryo will now continue to grow in the womb after its required time. When the growth is complete the child will be ready to enter the beautiful world. This is how embryogenesis occurs in many animals.
Child Development
The embryo is considered a fetus by the end of the 8th week after fertilization. At this stage, the buildings have already been built and upgraded. The following are the symptoms during pregnancy:
- The fetus feels the whole uterus at 12 weeks pregnant.
- Gender can be identified by week 14.
- Pregnant women can sense fetal movement in 16 to 20 weeks. Women, who are pregnant for the first time may feel it at this time but those who have had a previous pregnancy may feel it at 2 weeks.
- By about 24 weeks the fetus has a chance to continue living outside the womb.
- Until the time of childbirth, the lungs continue to mature. Throughout pregnancy, the brain collects new cells.
Stages of the Fetus Growth
The first trimester
The first trimester will last from pregnancy to 12 weeks. This is usually the first three months of pregnancy. During pregnancy, the fertilized egg will change from a small group of cells to a fetus that begins to have characteristics of the baby.
1 month (1 to 4 weeks)
As the fertilized egg grows, a watery sac forms around it, gradually filling the liquid. This is called the amniotic sac, and it helps to protect the developing embryo.
During this time, the placenta also grows. The placenta is a circular, flat organ that transports nutrients from the mother to the fetus, and removes impurities from the fetus. Think of the placenta as a source of food for your baby during your pregnancy.
In the first few weeks, the old face will appear with a large black eyeball. The mouth, lower jaw and throat grow. Blood cells grow, and blood circulation will begin. The tiny “heart” tube will beat 65 times per minute by the end of the fourth week.
By the end of the first month, the embryo is about 1/4 inch long – smaller than the grains of rice.
2nd month (5 to 8 weeks)
Facial features continue to grow. Each ear starts as a small fold of skin around the head. The tiny buds that eventually grow into arms and legs grow. Fingers, toes, and eyes also develop.
The neural tube (brain, spinal cord and other neural tissues of the central nervous system) is now well formed. The digestive tract and nerve organs also begin to develop. The bone begins to change cartilage.
The head is as big as the rest of the body at this point. By about 6 weeks, heartbeat is usually detected.
After 8 weeks, the health-care providers refer to it as an embryo instead of an embryo.
By the end of the second month, the embryo is about 1 inch long and weighs about 1/30 ounces.
3rd month (9 to 12 weeks)
The arms, hands, fingers, feet, and toes are fully formed. At this stage, the embryo begins to deteriorate further by performing tasks such as opening and closing the fists and mouths. Fingernails and toenails begin to grow and the outer ears form. The beginning of the teeth is formed under the gums. The reproductive organs are also growing, but sex is still difficult to distinguish by ultrasound.
By the end of the third month, the embryo is fully grown. All limbs (limbs) are present and will continue to grow to function. The circulatory and urinary systems are also active and the liver produces bile.
By the end of the third month, the embryo is 4 inches [4 cm] long and weighs about one ounce [1 ounce].
With the most significant improvement, your chances of having a miscarriage are greatly reduced after three months.
Second trimester
This intermediate stage of pregnancy is often thought of as the best part of the experience. By this time, any morning sickness is almost gone and the discomfort of early pregnancy is over. The fetus will begin developing facial features during this month. You may also begin to feel movement as the embryo rotates and turns in the womb. In this trimester, most people find out that their baby will be chosen by a man or a woman at birth. This is usually done during an anatomy scan (ultrasound examining body growth) for about 20 weeks.
4th month (13 to 16 weeks)
The baby’s heartbeat can now be heard with a device called a doppler. Fingers and toes well defined. Eyelids, eyebrows, eyelashes, nails and hair are formed. Teeth and bones are strong. The embryo is also able to absorb the thumbs, yawns, stretches, and face.
The nervous system is starting to work. The genitals and genitals are fully grown, and your doctor can see on ultrasound if the fetus will be selected by a man or a woman at birth.
By the end of the fourth month, the embryo is about 6 inches long and weighs 4 ounces.
5th month (17 to 20 weeks)
At this stage, you may start to feel the embryo moving. The fetus develops muscle mass and tests it. This initial movement is called quickening and may sound like flutter.
Hair begins to grow on the scalp. The shoulders, back and temples are covered with soft wool called lanugo. These hairs protect the fetus and are usually shed at the end of the first week of your baby’s life.
The skin is covered with a white cloth called vernix caseosa. This “cheese” item is thought to protect the baby’s skin from prolonged exposure to amniotic fluid. This plant is made just before birth.
By the end of the fifth month, the embryo is about 10 inches [10 cm] long and weighs 1/2 to 1 pounds.
6th month (21 to 24 weeks)
If you look inside the uterus right now, you will see that the fetus’ skin is red in color, wrinkled and the veins appear with glowing skin. Fingerprint and toe prints are visible. At this stage, the eyelids begin to separate and the eyes open.
The fetus responds to sounds by stimulating or stimulating the heartbeat. You may notice movement if the fetus hiccups.
If born prematurely, your baby may be alive after 23 weeks of intensive care.
By the end of the sixth month, the embryo is about 12 inches [12 cm] long and weighs in at 2 pounds [2 kg].
7th month (25 to 28 weeks)
The embryo continues to mature and increase body fat. At this point, the hearing is fully developed. The fetus changes position over time and responds to stimuli, including sound, pain, and light. Amniotic fluid begins to shrink.
If born prematurely, your baby may live after the seventh month.
By the end of the seventh month, the embryo is about 14 inches (14 cm) tall and weighs about 15 to 20 pounds (2 to 4 kg).
Third trimester
This is the last part of your pregnancy. You may be tempted to start counting until your due date and hope it will come sooner, but each week during this final stage of growth helps the fetus to prepare for birth. Throughout the third trimester, the fetus wears itself faster, adding extra body fat that will help after birth.
Remember, although the popular tradition only mentions nine months of pregnancy, you may be 10 months pregnant. A normal pregnancy, full-time for 40 weeks, which can take you to the tenth month. It is also possible that you can exceed your deadline by a week or two (41 or 42 weeks). Your healthcare provider will monitor you closely as you approach your birthday. If you exceed your deadline, and do not work automatically, your provider may tempt you. This means that the medicine will be used to cut and have a baby. Be sure to talk to your health care provider during this third phase about your birth plan.
8th month (29 to 32 weeks)
The embryo continues to mature and increase body fat. You may notice more kicks. The brain grows rapidly during this time, and the fetus can see and hear. Many internal systems are well developed, but the lungs may not be fully developed.
The fetus is 18 inches (18 cm) long and weighs about 15 pounds (5 kg).
9th month (33 to 36 weeks)
During this phase, the embryo continues to grow. The lungs will be fully developed by this time.
The fetus has coordinates of reflexes and can blink, close the eyes, turn the head, hold tight, and respond to sounds, light, and touch.
The embryo is 17 to 19 inches tall and weighs between 5 ½ pounds and 6 pounds.
10 Months (37 to 40 weeks)
During this last month, you may be able to give birth at any time. You may notice that the movement is small because the space is small. At this point, the embryos’ location may have changed since birth. Ideally, head down to your uterus. You may feel uncomfortable in this last moment as the embryo descends on your waist and prepares to give birth.
Your child is ready to meet the world at this time. They are about 18 to 20 inches [18 to 20 cm] long and weigh 20 pounds [7 kg].
FAQs
What is the baby's name during pregnancy?
The baby is called an embryo from conception to eight weeks of development. By eight weeks, the embryo is called a fetus.
When does a heartbeat start in pregnancy?
We will be able to monitor the baby's heartbeat with the help of an ultrasound at five and a half to six weeks pregnant. Within six and half weeks, heart rate may be monitored by ultrasound.
What does a five-day fetus look like?
The fetus will split in two and will lie down on the right side of the uterus. It will have a decent cell number with a decent cell ratio.
