AIM: What are the stages prenatal development Do Now: Using the timeline below & the facts from the video identify two major developmental milestones that occur at any of the weeks listed below.

3 stages prenatal development Germinal Stage Fetal stage- Embryonic stage-

Aim: What is life like inside the womb?

Fetal Development Month by Month

First Month Cell multiplication begins. Cell multiplication begins. The fertilized egg attached itself to the lining of the uterus (“implantation”) The fertilized egg attached itself to the lining of the uterus (“implantation”) Internal organs, circulatory and nervous systems are beginning to form. Internal organs, circulatory and nervous systems are beginning to form. Small limb buds show the beginning of arms and legs. Small limb buds show the beginning of arms and legs. Yolk Sac- Provides nutrients and blood to the fetus until the placenta is formed

First Month

Two Months The embryo is about 1 inch long. The embryo is about 1 inch long. Facial features begin to take shape. Facial features begin to take shape. Bones begin to form. Bones begin to form. Internal organs begin to develop. Internal organs begin to develop. PlacentaPlacenta- an organ with blood vessels that nourishes the baby in the uterus. Amniotic sac- The fluid-filed sac that surrounds and protects the unborn baby.

Two Months

Three Months By now the fetus is 2 1/2 to 3 inches long and is fully formed. By now the fetus is 2 1/2 to 3 inches long and is fully formed. He has begun swallowing and kicking. He has begun swallowing and kicking. All organs and muscles have formed and are beginning to function. All organs and muscles have formed and are beginning to function. Umbilical cord- the cord that connects the baby to the placenta. It’s the beginning of your navel..

Four Months Your baby is covered with a layer of thick, downy hair called lanugo. Your baby is covered with a layer of thick, downy hair called lanugo. His heartbeat can be heard clearly. His heartbeat can be heard clearly. At this time is when you may feel your baby's first kick. This is called quickening. At this time is when you may feel your baby's first kick. This is called quickening.

4 months

Five Months A protective coating called vernix caseosa begins to form on baby's skin. A protective coating called vernix caseosa begins to form on baby's skin. By the end of this month, your baby will be nearly 8 inches long and weighs almost a pound. By the end of this month, your baby will be nearly 8 inches long and weighs almost a pound.

Six Months Eyebrows and eyelids are visible. Eyebrows and eyelids are visible. Your baby's lungs are filled with amniotic fluid, and he has started breathing motions. Your baby's lungs are filled with amniotic fluid, and he has started breathing motions. If you talk or sing, he can hear you. If you talk or sing, he can hear you.

6 Months

Seven Months By the end of the seventh month, your baby weighs about 3 1/2 pounds and is about 12 inches long. By the end of the seventh month, your baby weighs about 3 1/2 pounds and is about 12 inches long. His body is well- formed. Fingernails cover his fingertips. His body is well- formed. Fingernails cover his fingertips.

Eight Months Your baby is gaining about half a pound per week, and layers of fat are piling on. Your baby is gaining about half a pound per week, and layers of fat are piling on. He has probably turned head-down in preparation for birth. He weighs between 4 and 6 pounds. He has probably turned head-down in preparation for birth. He weighs between 4 and 6 pounds.

Nine Months Your baby is a hefty 6 to 9 pounds and measures between 19 and 22 inches. Your baby is a hefty 6 to 9 pounds and measures between 19 and 22 inches. As he becomes more crowded, you may feel him move around less. As he becomes more crowded, you may feel him move around less.

What are the three stages of Prenatal Development? 1. Germinal Stage-It’s first 2 weeks of gestation. The unborn is called a zygote. 2. The Embryonic stage- It’s the 3 rd – 8 th week of gestation. It’s the most critical stage because all organs are developing. The unborn baby is called an “embryo” 3. The Fetal stage- It’s the 9 th – 38 th week of gestation. All body parts are continuing to become fully developed. The unborn baby is called a “fetus.”

Development in the Unborn Fat is forming Fat is forming One sperm has just penetrated an egg One sperm has just penetrated an egg Limb buds are forming Limb buds are forming Bone cells are replacing cartilage Bone cells are replacing cartilage Pregnancy becomes obvious Pregnancy becomes obvious The egg embeds itself in the wall of the uterus The egg embeds itself in the wall of the uterus The age viability is reached The age viability is reached Fetal Fetal Germinal Germinal Embryonic Embryonic Fetal Fetal Germinal Germinal Fetal Fetal

The umbilicord begins to form The umbilicord begins to form Developing baby resembles a human Developing baby resembles a human The zygote is 1/3 down the fallopian tube The zygote is 1/3 down the fallopian tube Body parts grow and mature Body parts grow and mature Head hair appears Head hair appears Teeth are forming Teeth are forming Internal organs are developing Internal organs are developing Embryonic Embryonic Germinal Germinal Fetal Fetal Embryonic Embryonic

The amnion, placenta and umbilicord are beginning The amnion, placenta and umbilicord are beginning Ears and eyes are beginning to form Ears and eyes are beginning to form Mothers feel baby’s movements Mothers feel baby’s movements Lanugo is forming Lanugo is forming Eyelids and nails are developing Eyelids and nails are developing Skin is developing Skin is developing Germinal Germinal Embryonic Embryonic Fetal Fetal

Terms to know…. Placenta- an organ filled with blood vessels that nourishes the baby in the uterus. Placenta- an organ filled with blood vessels that nourishes the baby in the uterus. Umbilical cord- the cord that connects the baby to the placenta. It’s the beginning of your navel. Umbilical cord- the cord that connects the baby to the placenta. It’s the beginning of your navel. Amniotic sac- The fluid-filled sac that surrounds and protects the unborn baby. Amniotic sac- The fluid-filled sac that surrounds and protects the unborn baby.

Prenatal Assignment#1 You will work independently in your notebooks on the following: – –Turn to the page opposite: “How does pregnancy really occur”   Briefly summarize the process of conception. Use the following terms in your summary: ovum, fallopian tube, sperm, uterus and implantation. Refer to your notes; include facts about the sperm and facts about the ovum in your summary.

Prenatal Assignment#2 Turn to the page opposite: “How is pregnancy detected” – –Answer the following question by completing the graphic organizer:   What are some common prenatal tests and what are they used for? PRENATAL TESTS

Turn to the page opposite page : “What is life like inside the womb?” – –Answer the question about the “amniotic sac” – –Next right page- informational poster brainstorming/ sketch page.

Poster Assignment (Individual): Create an Informational Poster that highlights what life is like inside the womb. – –To do: Choose a month (1, 2, 3 etc of prenatal development) and showcase the development of the unborn fetus. Be creative and include factual information, use appropriate terms and be creative. Assume that I know nothing about was going on inside the womb.