BS6 - Pregnancy
Unit 4 - BS6 - Pregnancy
Today's lesson
- Any Qs about the HW?
- Learn Basics 6: pregnancy
- Describe the fertilization of the human egg
- Decribe how pregnancy progresses
- Explain prenatal testing and give examples
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Slide 1: Diapositive
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Unit 4 - BS6 - Pregnancy
Today's lesson
- Any Qs about the HW?
- Learn Basics 6: pregnancy
- Describe the fertilization of the human egg
- Decribe how pregnancy progresses
- Explain prenatal testing and give examples
Slide 1 - Diapositive
Slide 2 - Vidéo
what is fertilisation?
- ovulation & ejaculation
- egg cell waits 12-24h in oviduct; sperm cells swim to oviduct
- sperm cell opens cell membrane of egg cell; cell membrane becomes impenetrable for the other sperm cells;
- head of sperm cell enters egg cell
- fertilisation = nucleus of sperm cell fuses with nucleus egg cell.
Slide 3 - Diapositive
implantation
Slide 4 - Diapositive
1
Sperm enters the female body
♂
2
Sperm swims through the uterus, towards the fallopian tubes.
♂
3
1 sperm cell can fertillize the ovum, the others die
without an ovum the sperm will die
♂
1
an ovum (egg cell) is released from the ovary = ovulation
♀
2
Ovum is fertilized by sperm cells and starts cell division.
OR
Ovum is not fertilized and dies in fallopian tube
♀
3
the fertiziled ovum starts cell division
♀
4
Implantation of the fertilized ovum, pregnancy has begun.
♀
fallopian tube
fertilization
ovulation
ovary
implantation
thick mucous lining
uterine wall
cervix
opening of uterus
Slide 5 - Diapositive
Pregnancy
- embryo
- foetus
- placenta
- umbilical cord
Slide 6 - Diapositive
Slide 7 - Diapositive
Slide 8 - Vidéo
Ultrasound scan and prenatal testing
Ultrasound
Combined test
- 9th-14th week of pregnancy
- Blood test of mother and foetus
- ultrasound of neck fold measurement of foetus
- together these 2 tests determine whether a child has Down's syndrome
Nipt
- 11th week of pregnancy
- non-invasive prenatal test
- Blood sample from the placenta
- DNA from placenta is nearly the same as the baby's
- shows likely hood of hereditary disease
Anomaly and non-medical scan
- after 20th week of pregnancy
- Anomaly: check for abnormalities of the heart, brain, organs, and limbs
- Non-medical: 3D
- 10 weeks pregnant
- Sound waves used to make a picture of foetus in the womb
- used to see when the woman became pregnant and when the baby will be born.
Slide 9 - Diapositive
What did we learn?
1.Describe the fertilization of the human egg
2.Decribe how pregnancy progresses
3. Explain prenatal testing and give examples
Do Now:
Read BS 6 - pregnancy
Do Qs. 1 t/m 3 and 5 (6-7 for VWO) and 8
