1 / 11

PARTURITION (Birth)

PART 5B . PARTURITION (Birth). Parturition: Delivery of the Baby. The birthing process or ‘labour’ Begins with uterine contractions Occurring every 15-20 mins in frequency and lasting for a duration of 40-60 sec. Parturition.

jered
Télécharger la présentation

PARTURITION (Birth)

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. PART 5B PARTURITION (Birth)

  2. Parturition: Delivery of the Baby • The birthing process or ‘labour’ • Begins with uterine contractions • Occurring every 15-20 mins in frequency and lasting for a duration of 40-60 sec.

  3. Parturition • Relaxin hormone is released by the placenta, loosening ligaments of the pelvis and softening the cervix. • Uterus contractions causes stretching of cervix • Stretching of cervix causes release of oxytocin from posteriorpituitary gland • Oxytocin stimulates uterine contractions and release of prostaglandins from the uterus • Prostaglandins cause uterine contractions (+) Feedback Cycle continues until baby is born

  4. Parturition Oxytocin Prostaglandins Stimulates (+ feedback) Baby’s head pushes downwards Stimulates (+ feedback) Stimulates (+ feedback)

  5. (Caesarean) C-Section Typical reasons: • Breech births • Small pelvis • STI complications

  6. Lactation • The secretion and formation of breast milk in the mother • Requires the hormone prolactin • not secreted during pregnancy because it is high levels of estrogen and progesterone suppress production • Secreted by anterior pituitary following birth

  7. Lactation

  8. Lactation and Suckling • Suckling stimulates nerve endings in the nipples • Nerve impulse causes the hypothalamus to stimulate the posterior pituitary to secrete oxytocin • Oxytocin causes mammary cells to contract causing the milk glands to produce milk • Contractions of milk glands cause milk to be secreted through ducts through the nipple.

  9. Lactation BIRTH

  10. Practice • Pg. 542-3 READ Case Study – Human Reproductive Technology • ANSWER #1-5 • Pg. 544 #4

More Related