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How does IVF work? The medicine behind in vitro fertilization, explained by an expert

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Heidi Collins Fantasia is an associate professor of nursing at University of Massachusetts, Lowell.


Since the overturning of Roe v. Wade in June 2022 ended the federal right to abortion, legislative attention has extended to many other aspects of reproductive rights, including access to assisted reproductive technologies such as in vitro fertilization, or IVF, after an Alabama Supreme Court ruling in February 2024.

University of Massachusetts, Lowell associate professor and department chair of the school of nursing Heidi Collins Fantasia explains how this decades-old procedure works and what its tenuous legal status means for prospective parents.

What is IVF?

IVF is a type of artificial reproductive technology that allows people with a range of fertility issues to conceive a child. It involves fertilizing an egg with sperm outside the body to form an embryo that is then transferred into the uterus to develop.

IVF is used as a treatment for infertility, which the American Society for Reproductive Medicine defines as an inability to achieve pregnancy “based on a patient’s medical, sexual, and reproductive history, age, physical findings, diagnostic testing” or the “need for medical intervention.”

While originally developed as a fertility treatment for blocked fallopian tubes, IVF is currently used for other conditions such as low sperm count or when the cause for infertility can’t be determined. LGBTQ people and single parents can also use IVF and other reproductive technologies to grow their families.

How does IVF work?

Typically during IVF, a patient takes hormones to stimulate the ovaries to produce eggs. Once a health professional retrieves the eggs using an ultrasound and a thin needle, they either incubate the sperm with the egg or inject the sperm into the egg in the lab to fertilize it. Which specific type of IVF procedure a patient undergoes is determined on an individual basis with a health care provider.

Scientists began to develop IVF in the 1930s, beginning with the live birth of rabbits and mice through the procedure. This research eventually led to the birth of the first “test-tube baby” in 1978. Physiologist Robert Edwards received the 2010 Nobel Prize in physiology or medicine for his research on IVF.

World's First IVF Baby Reaches 40
In 1978, Louise Brown, pictured here in 2018, became the first baby to be born using IVF. 

LEON NEAL / Getty Images


The technology has rapidly expanded since the first live human birth from IVF. The development of cryopreservation, or the freezing of human eggs and embryos, has enabled people to pursue pregnancy later in life. Genetic screening of cells from a developing embryo can identify genetic diseases and abnormalities.

The chance of a successful live birth through assisted reproductive technologies varies. Success rates depend on many factors, such as underlying cause of infertility, age and type of technology used.

Who currently has access to IVF?

Use of IVF has steadily increased since it was first introduced. In 2015, about 2% of all infants in the U.S. were conceived as a result of IVF, and public support for IVF is high overall.

Approximately 10% of women in the U.S. have used some type of fertility service to achieve a pregnancy. This includes fertility advice, medications to increase ovulation, fertility testing, surgery and IVF.

Because infertility increases with age, women older than 35 typically use these services more often than younger women. Women in the U.S. who access infertility care the least are often non-U.S. citizens and uninsured, and they typically have lower income and less education than women who do.

Differences in geography also affect IVF access. In 2021, over 5% of all infants in Massachusetts were conceived from IVF, but this dropped to less than 1% in New Mexico, Arkansas and Mississippi.

Service availability and insurance coverage for IVF procedures differ by state, which could account for some of the differences in use. Only a small number of states mandate that private insurers cover IVF. Public insurance coverage for infertility services is even lower.

The cost of IVF has been the greatest barrier to infertility care. Out-of-pocket costs for people without insurance coverage can range from over US$10,000 to $25,000 per cycle, with rising costs per cycle.

How do debates about when life begins affect IVF?

Political views vary around reproductive rights, and access to IVF is likely to become an issue in upcoming election cycles.

The Alabama Supreme Court ruled in February 2024 that frozen embryos created during the process of IVF were people. While the ruling currently applies only to Alabama, it has caused shock, confusion and concern among health care providers.

As a result of the ruling, two major IVF providers in Alabama have paused infertility care because of potential legal risk to health care providers. The main concern is whether providers can be held liable for wrongful death if frozen embryos don’t survive the thawing process.

Since the elimination of federal protection of abortion in 2022 with the overturning of Roe v. Wade, individual states have made their own laws regarding abortion access. Many patients, health care providers, researchers and legislators see the Alabama decision regarding IVF as a continuation of the increasing erosion of women’s reproductive rights.

The Conversation

This article is republished from The Conversation under a Creative Commons license.



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Details on bill to avert government shutdown

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Details on bill to avert government shutdown – CBS News


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Congress has unveiled its stopgap bill to keep the government funded until spring. CBS News congressional correspondent Nikole Killion has a look at what’s included in the measure.

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Explosion kills 2 Mexican soldiers in suspected booby trap by drug cartel after troops found dismembered bodies

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An improvised land mine apparently planted by a drug cartel killed two Mexican soldiers and wounded five others, Mexico’s defense secretary said Tuesday. Before the blast, the soldiers had discovered the dismembered bodies of three people, officials said.

Gen. Ricardo Trevilla acknowledged that the army had already suffered six deaths from such improvised explosive devices, or IEDs, between 2018 and 2024. But he didn’t specify whether those six had been killed by bombs dropped from drones, or by buried roadside bombs, both of which have been used by gangs in Mexico.

Trevilla said that devices like the one that exploded Monday were “very rustic,” and officials in the past have described them as similar to buried pipe bombs. There was no immediate information on the condition of the five wounded in the attack, which included at least one officer.

Trevilla’s description of the location where the two soldiers died Monday in the western state of Michoacan suggested that it may have been a sort of grisly drug cartel booby trap.

Trevilla said the army sent out a patrol to check on reports that there was an encampment of armed men in a rural area. The armed forces detected an area protected by stockades that appeared to be an encampment, but when soldiers approached in vehicles, they found the trail blocked by logs, so they descended and had to approach on foot.

While approaching, they spotted three dismembered bodies near the encampment, which appeared to be abandoned. But as they drew closer, a buried device exploded and struck the soldiers.

Trevilla blamed the blast on the United Cartels, an umbrella group that includes the local Viagras gang, which has been fighting bloody turf battles against the Jalisco cartel in Michoacan for years.

In August, the Mexican army acknowledged that some of its soldiers have been killed by bomb-dropping drones operated by drug cartels.

Previously, officials have said the army encounters far more roadside bombs than drone-dropped ones.

The Jalisco drug cartel has been fighting local gangs for control of Michoacan for years, and the situation has become so militarized that the warring cartels use roadside bombs or IEDs, trenches, pillbox fortifications, homemade armored vehicles and sniper rifles.

Nemesio Oseguera-Cervantes, also known as “El Mencho,” the leader of the Jalisco cartel, which the officials described as “one of the world’s most violent and prolific drug trafficking organizations.” The United States and the State Department has offered a $10 million reward for his capture.

In the only previous detailed report on cartel bomb attacks in August 2023, the defense department said at that time that a total of 42 soldiers, police and suspects were wounded by IEDs in the first seven and a half months of 2023, up from 16 in all of 2022.

Overall, 556 improvised explosive devices of all types – roadside, drone-carried and car bombs – were found in 2023, the army said in a news release last year.



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