FERTILIZATION, PREGNANCY AND BIRTH

Natural Science6th of Primary

SEX CELLS•Boys : spermatozoon Girls:

ovule

FERTILIZATION•It happens when a sperm meets with an

ovule.•It happens in the fallopian tubes•Then, the embryo implants in the uterus

PREGNANCY•The pregnancy lasts 9 months = 40 weeks

•During these 9 months the body of the mother changes a lot and also the embryo.

•The embryo eats and breath by the umbilical cord that is connected with the mother.

•It is in the interior of the amniotic sac

PREGNANCY• There are 3 stages in the pregnancy

▫In the first term (0-3 months): the brain and the principal organs of the body are developed. At the end of this term it is called foetus

▫In the second term (3-6 months): the foetus can listen and it moves

▫In the third term (6-9 months): it grows and gets fatter to be prepared to the moment of birth

• The babies that are born before the 37th week are called prematures.

PREGNANCY

BIRTH• It is the moment in which the baby is born.

• First, the amniotic sac is broken and all the liquid that is inside goes out.

• Then, the cervix starts to dilate

• After that, some contractions help the mother to deliver the baby

• Finally, the placenta is expelled

BIRTH There are 3 stages

QUESTIONS•What is the name of the female sex cell?•In which stage of birth is the expulsion of

the placenta?•In which stage of pregnancy the baby

moves a lot?•How often does the ovule goes out of the

ovary?

ACTIVITIES•1. Draw a picture of the fertilization and

write the name of the two sexual cells•2. What do you know about pregnancy

and birth? - How many months are necessary to create a person? - If a person is born before the 37 week is called ________ - What’s the name of the part that connect the baby with

the mother during the pregnancy? - What is necessary to happen in the uterus when the baby

is going to be born? - What liquid is expelled in one stage of the birth?

JOURNAL•Write 5 sentences about today’s class