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Main article: At some point, the growing • • • Advantages to Internal Fertilization [ ] Internal fertilization allows for: • Female • Making a decision for the conditions of reproduction, like location and time. • Egg protection on dry land. Disadvantages to Internal Fertilization [ ] • • Along with internal fertilization comes • Fewer offspring are produced through internal fertilization in comparison to external fertilization. This is both because the mother cannot hold and grow as many offspring as eggs, and the mother cannot provide and obtain enough resources for a larger amount of offspring. Fish [ ] Some species of fish like guppies have the ability to internally fertilize, this process happens by the male inserting a tubular fin into the female’s reproductive opening and then will deposit sperm into her reproductive tract. There are other species of fish that are mouthbrooders which means that one fish puts the eggs in its mouth for incubation. A certain type of fish that is a mouthbrooder is called cichlids and many of them are maternal mouthbrooders. The process for this is the female would lay the egg and pick it up in her mouth. Then the males will encourage the female to open her mouth so they can fertilize the eggs while it’s in the female’s mouth. Amphibians [ ] Most amphibians have external fertilization but there is an exception to some like salamanders which mostly have internal fertilization. Salamanders do not use intercourse for sexual reproduction due...

Learn more about how the IVF process works. What is IVF? In vitro fertilization (IVF) is a type of assisted reproductive technology (ART) where sperm and an egg are fertilized outside of the human body. IVF is a complex process that involves retrieving eggs from ovaries and manually combining them with sperm in a lab for fertilization. Several days after fertilization, the fertilized egg (now called an embryo) is placed inside a uterus. Pregnancy occurs when this embryo implants itself into the uterine wall. Why is IVF performed? People choose IVF for many reasons, including IVF is an option if you or your partner has: • Blocked or damaged fallopian tubes. • • Low sperm count or other sperm impairments. • • • Problems with your uterus. • Risk of passing on a genetic disease or disorder. • Unexplained • Are using an egg donor or a gestational surrogate. How long is the IVF process from beginning to end? IVF is a complicated process with many steps. On average, you can expect the process to last four to six weeks. This includes the time before egg retrieval, when a person takes fertility medication until they’re tested for pregnancy. How common is IVF? Approximately 5% of couples with infertility will try IVF. More than 8 million babies have been born from IVF since 1978. It’s one of the most effective assisted reproductive technologies (ARTs) available. What is the difference between IVF and IUI (intrauterine insemination)? Intrauterine insemination (IUI) is different from ...

Internal and external organs of the female reproductive system. What is the female reproductive system? The female reproductive system is the body parts that help women or people assigned female at birth (AFAB): • Have sexual intercourse. • Reproduce. • Menstruate. What are the parts of the female reproductive system? The female reproductive anatomy includes both external and internal parts. External parts The function of your external genitals are to protect the internal parts from infection and allow sperm to enter your vagina. Your vulva is the collective name for all your external genitals. A lot of people mistakenly use the term “vagina” to describe all female reproductive parts. However, your vagina is its own structure located inside your body. The main parts of your vulva or external genitals are: • Labia majora: Your labia majora (“large lips”) enclose and protect the other external reproductive organs. During puberty, hair growth occurs on the skin of the labia majora, which also contain sweat and oil-secreting glands. • Labia minora: Your labia minora (“small lips”) can have a variety of sizes and shapes. They lie just inside your labia majora, and surround the opening to your vagina (the canal that joins the lower part of your uterus to the outside of your body) and urethra (the tube that carries pee from your bladder to the outside of your body). This skin is very delicate and can become easily irritated and swollen. • Clitoris: Your two labia minora meet at y...

\( \newcommand\) • • • • • External Fertilization External fertilization usually occurs in aquatic environments where both eggs and sperm are released into the water. After the sperm reaches the egg, fertilization can then take place. Most external fertilization happens during the process of spawning where one or several females release their eggs and the male(s) release sperm in the same area, at the same time. The release of the reproductive material may be triggered by water temperature or the length of daylight. Nearly all fish spawn, as do crustaceans (such as crabs and shrimp), mollusks (such as oysters), squid, and echinoderms (such as sea urchins and sea cucumbers). Pairs of fish that are not broadcast spawners may exhibit courtship behavior. This allows the female to select a particular male. The trigger for egg and sperm release (spawning) causes the egg and sperm to be placed in a small area, enhancing the possibility of fertilization. Figure \(\PageIndex\): Anemone fish protecting its spawn: An image of an Anemone fish protecting its spawn. The anemone fish utilizes a form of external fertilization. External fertilization in an aquatic environment protects the eggs from drying out. Broadcast spawning can result in a greater mixture of the genes within a group, leading to higher genetic diversity and a greater chance of species survival in a hostile environment. For sessile aquatic organisms such as sponges, broadcast spawning is the only mechanism for fertiliza...

How Do You Get Pregnant? | Planned Parenthood Video How Do You Get Pregnant? | Planned Parenthood Video It can take up to 6 days after sex for the sperm and egg to join — if a sperm cell joins with an egg, it's called fertilization. The fertilized egg moves towards your uterus. It gets to your uterus about 3-4 days after fertilization, and it can float around in your uterus for another few days. Pregnancy officially begins during implantation — when the fertilized egg attaches to the lining of your uterus, andthe hormones needed to support pregnancy are released. It can take 3-4 days for the fertilized egg to completely implant itself in the lining of the uterus. The most common way people get pregnant is from penis-in-vagina sex. But if semen (cum) gets ON the vulva or near the vaginal opening, sperm cells can swim into the vagina and cause pregnancy — but this is way less common. The only way to be sure of a pregnancy is to take a pregnancy test. You can purchase a home pregnancy test at drugstores or you can go to There are a few different kinds of emergency contraception. Learn more about Tags:

There are many misconceptions about fertilization and pregnancy. Many people don’t understand how and where fertilization takes place, or what happens as an embryo develops. While fertilization can seem like a complicated process, understanding it can equip you with knowledge about your own reproductive system and empower you to make decisions. Let’s take a closer look at 10 facts about fertilization. Some of these may even surprise you. Many people think fertilization occurs in the uterus or ovaries, but this isn’t true. Fertilization takes place in the Fertilization happens when a sperm cell successfully meets an egg cell in the fallopian tube. Once fertilization takes place, this newly fertilized cell is called a zygote. From here, the zygote will move down the fallopian tube and into the uterus. The zygote then burrows into the uterus lining. This is called implantation. When the zygote implants, it’s called a blastocyst. The uterus lining “feeds” the blastocyst, which eventually grows into a fetus. An exception to this rule would happen with If your fallopian tubes are Usually, only one egg is released during ovulation. However, the ovaries sometimes release two eggs at once. It’s possible for both eggs to be fertilized by two different sperm cells. In this case, you might become pregnant with twins. These twins will be known as fraternal twins (also called nonidentical twins). Because they come from two separate egg cells and two separate sperm cells, they won’t have...

Fertilization in Animals The process of fusion of sperm with egg (ovum) to produce a zygote is called Fertilization in most animals is similar to that in humans. Animals also produce gametes for fusion. But the fusion of gametes may take place inside or outside the body. Based on this, fertilization is of two types – internal and external fertilization. Internal Fertilization In sexual reproduction, the male inserts the semen into the female reproductive tract to fuse with the egg. If the fusion takes place within the female parent, it is called internal fertilization. In humans and most animals like cats, lions, pigs, dogs, hens, etc., the fusion of gametes takes place internally. In this type, a zygote is formed within the mother and gets its nourishment from her. External Fertilization When the fusion of sperm and egg takes place outside the female parent, it is called external fertilization. Only a minority of organisms exhibit this type of gamete fusion. For example, fish, frogs, etc. Here the female parent deposits her eggs in the external environment and later, the male parent ejects his sperm over them, and then the fusion of the gametes takes place in the external environment. Gametes that fuse externally have to face many challenges. Since eggs and sperms are deposited in the external environment, the chances of fusion are very less. Predators may eat the eggs or the zygote that is formed. To compensate for this loss, organisms like fish and frogs lay hundreds of...

Term Meaning Gamete A reproductive (sex) cell. In females, egg; in males, sperm Fertilization The process in sexual reproduction in which a female gamete and male gamete fuse to form a new cell Zygote Cell resulting from fertilization Diploid (2n) Cell that contains two sets of homologous chromosomes Haploid (n) Cell that contains only a single set of genes Apoptosis The process of programmed cell death Differentiation The process by which cells become specialized in structure and function Unnecessary cells also must be removed in order to help form important structures. This occurs is through the process of apoptosis. For example, human hands start out as a paddle-like block of tissue. Eventually, the block was “carved” into fingers by apoptosis of the cells in between the developing fingers. Human fertilization occurs in the fallopian tube. Many people believe that human fertilization occurs in the vagina, but this is not the case. Once sperm enter the vagina, they can move through the cervix, into the uterus, and to the end of a fallopian tube. If a sperm is able to fuse with an egg, fertilization occurs. • Development is sort of pre-determined. While it IS true that all humans in early development look the same, many of the features that later develop in a fetus are already pre-determined by its genes. For example, the biological sex of the fetus is already decided based on whether it received two X chromosomes (one from each parent) or an X from its mother and a Y fro...

Implantation is one of the most dramatic biological events of your entire pregnancy — fertilization being the first. You may not even notice that implantation is happening, although some women experience period-like cramping and a little spotting. Either way, implantation silently marks the making of an embryo even before you know for sure that you're expecting. What is implantation during pregnancy? Implantation is when an embryo burrows deep into the lining of the uterus, where it can then begin to grow. Implantation happens after Trusted Source How Your Fetus Grows During Pregnancy From a medical perspective, successful implantation is the true start of pregnancy, says Once the embryo is implanted, it starts releasing hormones that prepare your body for baby, turning off your period, When does implantation occur? Implantation occurs about eight to nine days after fertilization, though it can happen as early as six days and as late as 12 days after ovulation. Put another way: “If a woman has a regular 28-day menstrual cycle, ovulation typically occurs around day 14 of the cycle, and implantation may occur between days 20 to 26,” Dr. Jain says. What are the signs and symptoms of implantation? Some women notice signs of implantation, while others do not. “Not experiencing signs of implantation does not necessarily mean that you are not pregnant,” Dr. Jain says. “Many women do not experience any symptoms of implantation, and still go on to have healthy pregnancies.” That sa...

How Do You Get Pregnant? | Planned Parenthood Video How Do You Get Pregnant? | Planned Parenthood Video It can take up to 6 days after sex for the sperm and egg to join — if a sperm cell joins with an egg, it's called fertilization. The fertilized egg moves towards your uterus. It gets to your uterus about 3-4 days after fertilization, and it can float around in your uterus for another few days. Pregnancy officially begins during implantation — when the fertilized egg attaches to the lining of your uterus, andthe hormones needed to support pregnancy are released. It can take 3-4 days for the fertilized egg to completely implant itself in the lining of the uterus. The most common way people get pregnant is from penis-in-vagina sex. But if semen (cum) gets ON the vulva or near the vaginal opening, sperm cells can swim into the vagina and cause pregnancy — but this is way less common. The only way to be sure of a pregnancy is to take a pregnancy test. You can purchase a home pregnancy test at drugstores or you can go to There are a few different kinds of emergency contraception. Learn more about Tags: