BS6 - Pregnancy

Unit 4 - BS6 - Pregnancy
Today's lesson
  1. Any Qs about the HW?
  2. Learn Basics 6: pregnancy
  3. Describe the fertilization of the human egg
  4. Decribe how pregnancy progresses
  5. Explain prenatal testing and give examples

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Unit 4 - BS6 - Pregnancy
Today's lesson
  1. Any Qs about the HW?
  2. Learn Basics 6: pregnancy
  3. Describe the fertilization of the human egg
  4. Decribe how pregnancy progresses
  5. Explain prenatal testing and give examples

Slide 1 - Diapositive

Slide 2 - Vidéo

what is fertilisation?
  1. ovulation & ejaculation
  2. egg cell waits 12-24h in oviduct; sperm cells swim to oviduct
  3. sperm cell opens cell membrane of egg cell; cell membrane becomes impenetrable for the other sperm cells;
  4. head  of sperm cell enters egg cell
  5. 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

Slide 10 - Diapositive