Essay about Eggs, Sperm, and Hormones

It is assumed by most that we will all be able to grow up, fall in love, get married, and then have children of our own. This is not the lifestyle that all people choose, but it is still the view accepted by the majority of society. What happens when the unthinkable occurs and a happily married couple is unable to get pregnant? This is a reality for 7.1%, or 2.8 million, of the married couples in the United States (Lenox, 1999). Today, there are many people all over the world that decide to use fertility treatments to help them conceive a child, and this often leads to the birth of twins, triplets, or even higher order multiples. There are many risk factors that are involved in this type of

4. What is it called when an egg from the female is withdrawn and fertilized with sperm in a laboratory for 2 to 3 days with subsequent implantation into the uterus?

The ability to compare and relate from animal models shows us that the reproductive physiology can provide us with the knowledge to understand and question theories that are left unanswered (Davis et al. 2010).

c 4. c 5. d SHORT ANSWER 1. Sperm move from the seminiferous tubules to the epididymis, through the vas deferens and urethra, and out of the penis. 2.

Dr. Kim Vonnahme has been a very important addition to the Animal Science Department at NDSU for the past eleven years. She has brought her tremendous knowledge of the reproductive tracts in animals to research and hands on projects for the students here at NDSU. Dr. Vonnahme received her Bachelor of Science Degree in Animal Science at Iowa State University in 2006. She continued to further her educational background by attending Oklahoma State University to obtain her Master’s Degree in Animal Science in 1998. Afterwards, she attended University of Wyoming to receive her PhD in Reproductive Physiology (Kim Vonnahme, 2014; Research Profile-Kim, 2014).

Those stages are the Germinal stage, the Embryonic stage, and the Fetal stage. The Germinal Stage is the first stage and it is a two-week period that happens after the sperm and egg cell join together to form a zygote. This process is called conception. After conception, the zygote begins to divide. This turns into into a ball of cells that moves beside the fallopian tube. This travels all the way to the uterus. This process is called implantation and it happens when the cells is placed in the wall of the uterus. This process takes about a week to complete. After the two weeks, the Embryonic stage takes place next. The embryonic stage takes two to eight weeks right after conception. At this point in the process, the ball of cells is now an embryo. In this stage, all the major organs form. The last stage of prenatal development is the Fetal stage. This last eight weeks after conception up to birth. One of the first things to take place is the sex organs begin to form. Next, the bones form, muscles form, and the fetus begins to move. The organ systems also begin to develop and the brain’s size grows. One of the last things to work independently is the respiratory and digestive

In the female reproductive system a hormone known as estrogen is controlled by gonadotropin which is controlled by negative feedback. During negative feedback from the estrogen prevent the anterior pituitary gland

Infertility can be extremely challenging for couples to overcome. It can be not only physically draining, but emotionally and mentally as well. Infertility can be easily compared to a roller coaster, with emotions going up and down from hope and optimism plummeting down to frustration and even grief after many the couple has tried for a long period of time. While for me personally, I first think of women when I think of infertility, the men play a large role as well. They are also hoping for children and the biological reason for the infertility can be from either sex. Research has also shown that infertility can make physically difficult and cause anxiety in couples, which could led to increased difficulty in conceiving (Domar & Gordon,

Semen is the male reproductive fluid, containing spermatozoa in suspension. Sperm is a male reproductive cell. Prostate is a gland surrounding the neck of the bladder in male mammals and releasing prostatic fluid. Urethra is a duct by which urine is convey out of the body from the bladder, and which in male vertebrates also conveys semen. Penis is the male genital organ of higher vertebrates, carrying the duct for the transfer of sperm during copulation. Glans is the head of a penis. A shaft is the cylindrical part of the penis between the scrotum and head. Seminiferous tubules is any of the numerous long convoluted tubules in the testis which are the sites where spermatozoa mature. Seminal vesicles is each of a pair of glands that open into the vas deferens near its junction with the urethra and secrete many of the components of semen. Bladder is a membranous sac in human and other animals, which urine is collected for excretion.

In vitro fertilisation (IVF) marks a great step forward in medical technology, and Australia is a leader in the field. IVF is now a popular procedure for couples who are infertile or are having trouble conceiving. However, it raises ethical, moral and legal issues including the rights of an individual, property rights, the definition of human life, scientific experimentation versus a potential human life, religion, costs, and community, medical and taxpayer’s rights.

http://kidshealth.org/parent/interactive/frs_it.html In this interactive diagram/demonstration we have pictured the vagina, uterus, fallopian tubes, and the ovaries. When you scroll over a particular part of the picture it will give you the name, what it is, and the function of that part. For instance if you scrolled over the Fallopian Tubes it will tell you that it is a thin soft tube that connects the Uterus to the Ovaries. During ovulation the ovaries will release an egg/s and they will travel through the fallopian tube to the uterus. Essentially it’s the road way. I find this valuable because you can tell someone something about their body all day long but it’s nothing like seeing what it is and how it works for you to

Martin, after careful consideration and researching in unique methods, comes to an overall conclusion that there are cultural influences in the way egg and sperm interactions are presented in textbooks. This conclusion has many serious

Do you know how you were born? Do you know how you came to be? The reproductive system is the system that made that all possible. Without the reproductive system you wouldn’t have been born. In order to produce offspring, the male and female reproductive systems have to be different. Each system has different parts, problems and care. Each system have different purposes, the male reproductive system’s function is to produce sperm, while the female reproductive system’s function is to produce ova, store ova and house a fertilized egg.

the sperm are categorized as masculine and feminine. Finally, it seems that the end goal of

Testes are kept in the scrotum sac and are two oval shaped glands, about 8,5cm long and 2.5cm wide. A midline septum divides the scrotum into two halves and each testical is covered in two tunics; the Tunica vaginalis from the peritoneum and the Tunica albuginea which is a deeper tunic and a fibrous capsule. The septa from this layer then divides the testes into 250 – 300 wedge shaped compartments or lobules. It is in these lobules that seminiferous tubules are found, where sperm is made. Each lobule contains about 1 – 4 seminiferous tubules. The network into which seminiferous tubules empty is called the Rete testis. After which, the epididymis receives sperm from the rete testis network.