"These laws are unconstitutional, as we have understood Supreme Court rulings until now, and courts have quickly issued preliminary injunctions blocking enforcement," said Elizabeth Nash, state policy analyst for the Guttmacher Institute, a research organisation that supports abortion rights.
"This is the first one that has gone into effect," she added. "This is huge in that respect."
Here are answers to a few common questions about the new legislation.
Is the law a complete ban on abortions?
The law bars abortions once cardiac activity can be detected in the embryo. This typically occurs around the sixth week of pregnancy.
That is very early in a pregnancy, and many women do not know they are pregnant at that point. By the time a pregnant woman misses her period, she is four weeks pregnant, as doctors usually define it.
Under the Texas law, then, a woman would have about two weeks to recognise her condition, confirm the pregnancy with a test, make a decision about how to manage the pregnancy and obtain an abortion.
Many women may not track their periods carefully, may have irregular cycles, or may not know the exact date of the start of their last period, experts noted.
"It is extremely possible and very common for people to get to the six-week mark and not know they are pregnant," said Dr. Jennifer Villavicencio, lead for equity transformation at the American College of Obstetricians and Gynaecologists.
The cardiac activity detected on ultrasound is not a true heartbeat, Villavicencio added. It results from electrical activity, but the valves of the heart have not yet formed. And the sound does not indicate the pregnancy is viable, she said.
"Forcing them to find out about a pregnancy and make a decision about how to manage it in a short period of time is antithetical to ethical care," Villavicencio said.
Does the law make exceptions for pregnancies resulting from rape or incest, or to protect the life of the mother?
The law does not make exceptions for rape or incest. It does permit abortions for health reasons, but the exceptions are narrowly drawn, allowing a termination only if the pregnancy could endanger the mother's life or lead to "substantial and irreversible impairment of a major bodily function," Nash noted.
"These are very narrow exceptions," she said, and the language does not cover every instance in which a woman's health might be at risk. Nonetheless, she added, "Health providers will be very conservative about interpreting the law, because they don't want to cross a line."
Doesn't Roe v. Wade guarantee a woman's right to abortion? Can the Texas law be challenged on constitutional grounds?
The Texas law bars state officials from actually enforcing it, a design intended to make it difficult to challenge in the courts.
Usually a lawsuit aiming to block such a law as unconstitutional names state officials as defendants. Instead, the Texas law deputises private citizens to sue anyone who performs an abortion or "aids and abets" a procedure. Plaintiffs who have no connection to the patient or the clinic may sue and recover legal fees, as well as US$10,000 if they win.
As a result, the question for the Supreme Court is not whether the law is constitutional, but whether it can be challenged in court.
Does Texas now have the most restrictive abortion law in the nation?
Other states — including Georgia, Mississippi, Kentucky and Ohio — have also passed "heartbeat" laws that ban abortion once cardiac activity can be detected on an ultrasound scan.
Those laws would also ban abortions at about six weeks of pregnancy, 18 weeks earlier than the legal standard set by Roe v. Wade, which allows abortion up until about 24 weeks, roughly the point when a foetus can survive outside the womb. But those state laws have been held up by legal challenges and have not been implemented.
Abortion providers in Texas estimate that 85 per cent of patients seeking abortion are at least six weeks pregnant and would be denied care under the new state law.
Who will be most affected by the Texas law?
There are 7 million women of childbearing age in Texas, and the law will make it more difficult for all of them to obtain abortions in the state, as legislators intended.
But the measure will create nearly insurmountable obstacles for certain vulnerable populations, abortion providers said. Among them: teenagers, who often don't realise they are pregnant until later in a pregnancy; low-income people, who need to find about US$550 to cover the cost of the procedure; people of colour; and immigrants without legal status.
About 70 per cent of abortions in Texas in 2019 were provided to women of colour, according to the Guttmacher Institute.
Texas requires minors to obtain permission from a parent or guardian to gain access to abortion care. Some minors must go to court to do so, adding to the delays, said Rosann Mariappuram, executive director of Jane's Due Process in Austin, Texas, which helps teenagers get abortions.
Kamyon Conner, the executive director of the Texas Equal Access Fund, which helps low-income women pay for abortions, said she was particularly concerned about the new law's potential impact on Black women in Texas, who already face high maternal mortality rates.
Women in the country illegally cannot travel easily around the state to get access to care, she added, and women with chronic illnesses can find a pregnancy life-threatening.
This article originally appeared in The New York Times.
Written by: Roni Caryn Rabin
Photographs by: Montinique Monroe
© 2021 THE NEW YORK TIMES