In human female explain :
(1) Implantation and development. (2) Placenta and
(3)child birth.
(answer in detail in approximately 4 marks i.e. about 8 points)
Answers
Answer:
no I don't no sorry please try to another
Answer:
1)In humans, implantation is the stage of pregnancy at which the embryo adheres to the wall of the uterus. At this stage of prenatal development, the conceptus is called a blastocyst. It is by this adhesion that the embryo receives oxygen and nutrients from the mother to be able to grow.
Fertilization in humans. The sperm and ovum unite through fertilization, creating a conceptus that (over the course of 8-9 days) will implant in the uterine wall, where it will reside over the course of nine months.
2)The placenta is an organ that develops in your uterus during pregnancy. This structure provides oxygen and nutrients to your growing baby and removes waste products from your baby's blood. The placenta attaches to the wall of your uterus, and your baby's umbilical cord arises from it.
3)Childbirth, also known as labour and delivery, is the ending of pregnancy where one or more babies leaves the uterus by passing through the vagina or by Caesarean section.In 2015, there were about 135 million births globally.About 15 million were born before 37 weeks of gestation,while between 3 and 12 percent were born after 42 weeks.In the developed world most deliveries occur in hospitals,while in the developing world most births take place at home with the support of a traditional birth attendant.
Childbirth
Other names
Labour and delivery, labor and delivery, partus, giving birth, parturition, birth, confinement.
The most common way of childbirth is a vaginal delivery. It involves three stages of labour: the shortening and opening of the cervix, descent and birth of the baby, and the delivery of the placenta. The first stage typically lasts 12 to 19 hours, the second stage 20 minutes to two hours, and the third stage five to 30 minutes.The first stage begins with crampy abdominal or back pain that last around half a minute and occur every 10 to 30 minutes.The pain becomes stronger and closer together over time.During the second stage, pushing with contractions may occur. In the third stage, delayed clamping of the umbilical cord is generally recommended. A number of methods can help with pain, such as relaxation techniques, opioids, and spinal blocks.