Arizona Revised Statutes

Ariz. Rev. Stat. § 36-2151 (2026)

Definitions

✓ current as of May 2026
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36-2151. Definitions

In this article, unless the context otherwise requires:

1. "Abortion" means the use of any means to terminate the clinically diagnosable pregnancy of a woman with knowledge that the termination by those means will cause, with reasonable likelihood, the death of the unborn child.  Abortion does not include birth control devices, oral contraceptives used to inhibit or prevent ovulation, conception or the implantation of a fertilized ovum in the uterus or the use of any means to save the life or preserve the health of the unborn child, to preserve the life or health of the child after a live birth, to terminate an ectopic pregnancy or to remove a dead fetus.

2. "Auscultation" means the act of listening for sounds made by internal organs of the unborn child, specifically for a heartbeat, using an ultrasound transducer and fetal heart rate monitor.

3. "Bodily remains" means the physical remains, corpse or body parts of an unborn child who has been expelled or extracted from his or her mother through abortion.

4. "Conception" means the fusion of a human spermatozoon with a human ovum.

5. "Final disposition" has the same meaning prescribed in section 36-301.

6. "Genetic abnormality" has the same meaning prescribed in section 13-3603.02.

7. "Gestational age" means the age of the unborn child as calculated from the first day of the last menstrual period of the pregnant woman.

8. "Health professional" has the same meaning prescribed in section 32-3201.

9. "Medical emergency" means a condition that, on the basis of the physician's good faith clinical judgment, so complicates the medical condition of a pregnant woman as to necessitate the immediate abortion of her pregnancy to avert her death or for which a delay will create serious risk of substantial and irreversible impairment of a major bodily function.

10. "Medication abortion" means the use of any medication, drug or other substance that is intended to cause or induce an abortion.

11. "Physician" means a person who is licensed pursuant to title 32, chapter 13 or 17.

12. "Pregnant" or "pregnancy" means a female reproductive condition of having a developing unborn child in the body and that begins with conception.

13. "Probable gestational age" means the gestational age of the unborn child at the time the abortion is planned to be performed and as determined with reasonable probability by the attending physician.

14. "Surgical abortion" means the use of a surgical instrument or a machine to terminate the clinically diagnosable pregnancy of a woman with knowledge that the termination by those means will cause, with reasonable likelihood, the death of the unborn child.  Surgical abortion does not include the use of any means to increase the probability of a live birth, to preserve the life or health of the child after a live birth, to terminate an ectopic pregnancy or to remove a dead fetus.  Surgical abortion does not include patient care incidental to the procedure.

15. "Ultrasound" means the use of ultrasonic waves for diagnostic or therapeutic purposes to monitor a developing unborn child.

16. "Unborn child" means the offspring of human beings from conception until birth.

Notes of Decisions
Cited in 13 cases (5 in the last 5 years), 1975–2024 · leading case: Paul Isaacson v. Tom Horne, 716 F.3d 1213 (9th Cir. 2013).
Paul Isaacson v. Tom Horne, 716 F.3d 1213 (9th Cir. 2013). · cites it 7× “Ariz. Rev. Stat. § 36-2151 (6). The stated purpose of the Act is to “[p]rohibit abortions at or after twenty weeks of gestation, except in cases of a medical emergency, based on the documented risks to women’s health and the strong medical evidence that unborn children feel pain…”
Roe v. Arizona Bd. of Regents, 549 P.2d 150 (Ariz. 1976). · cites it 12× “NOTES [1] Pursuant to A.R.S. § 36-2151 a hospital is not required to admit a patient for the purpose of performing an abortion.”
Tucson Women's Ctr. v. Arizona Med. Bd., 666 F. Supp. 2d 1091 (D. Ariz. 2009). · cites it 7× “Section 36-2151 defines terms used in these other sections.”
Roe v. Arizona Bd. of Regents, 534 P.2d 285 (Ariz. Ct. App. 1975). · cites it 12× “The Board of Regents in addition to the aforementioned statute relies on A.R.S. § 36-2151 to justify its actions. This statute, passed in 1973, states: "No hospital is required to admit any patient for the purpose of performing an abortion.”
Planned Parenthood Arizona, Inc. v. Am. Ass'n of Pro-Life Obstetricians & Gynecologists, 257 P.3d 181 (Ariz. Ct. App. 2011). · cites it 2× “FACTS AND PROCEDURAL HISTORY 2 ¶ 3 On July 13, 2009, the Governor signed House Bill 2564 and Senate Bill 1175, which amended AR.S. §§ 36-2151 through -2155. 2009 Ariz.”
Tucson Woman's Clinic v. Eden, 371 F.3d 1173 (9th Cir. 2004). “Moreover, Arizona explicitly gives all hospitals the right to refuse to allow abortions to be performed at the hospital, Ariz.Rev.Stat. § 36-2151, and has prohibited all abortions in public university hospitals except those necessary to save the life of the woman having the…”
Tucson Woman's Clinic v. Eden, 379 F.3d 531 (9th Cir. 2004). “Moreover, Arizona explicitly gives all hospitals the right to refuse to allow abortions to be performed at the hospital, Ariz.Rev.Stat. § 36-2151, and has prohibited all abortions in public university hospitals except those necessary to save the life of the woman having the…”
Isaacson v. Horne, 884 F. Supp. 2d 961 (D. Ariz. 2012). · cites it 12× “2012) (to be codified as Ariz.Rev. Stat. § 36-2151(1)). “Gestational age” is defined as “the age of the unborn child as calculated from the first day of the last menstrual period of the pregnant woman.”
Planned Parenthood Arizona, Inc. v. Mark Brnovich (Ariz. Ct. App. 2022). · cites it 2× “, A.R.S. §§ 36-2151 to 36-2164, 36-2301 to 36-2326, and A.”
Isaacson v. Mayes (D. Ariz. 2022). · cites it 2× “For the purposes of this section, “unborn child” has the same meaning prescribed in § 36-2151. 27 28 Section 36-2151, in turn, defines “unborn child” as “the offspring of human beings from 1 conception until birth,” and “conception” as “the fusion of a human spermatozoon with a…”
Isaacson v. Mayes (D. Ariz. 2023). · cites it 2× “58(G)(2), and “medical emergency” as “a condition that, on the basis of the physician’s 27 good faith clinical judgment, so complicates the medical condition of a pregnant woman 28 as to necessitate the immediate abortion of her pregnancy to avert her death or for which a 1…”
Planned Parenthood v. Kristin mayes/hazelrigg (Ariz. 2024). “2 References to “Title 36” pertain strictly to the abortion statutes codified in title 36, chapters 20 and 23, §§ 36-2151 through -2164, and §§ 36-2301 through -2326.”
— Ariz. Rev. Stat. § 36-2151(1) — 1 case
Isaacson v. Horne, 884 F. Supp. 2d 961 (D. Ariz. 2012). “2012) (to be codified as Ariz.Rev. Stat. § 36-2151(1)). “Gestational age” is defined as “the age of the unborn child as calculated from the first day of the last menstrual period of the pregnant woman.”
— Ariz. Rev. Stat. § 36-2151(4) — 2 cases
Paul Isaacson v. Tom Horne, 716 F.3d 1213 (9th Cir. 2013). “Ariz. Rev. Stat. § 36-2151 (6). The stated purpose of the Act is to “[p]rohibit abortions at or after twenty weeks of gestation, except in cases of a medical emergency, based on the documented risks to women’s health and the strong medical evidence that unborn children feel pain…”
Isaacson v. Horne, 884 F. Supp. 2d 961 (D. Ariz. 2012). “2012) (to be codified as Ariz.Rev. Stat. § 36-2151(1)). “Gestational age” is defined as “the age of the unborn child as calculated from the first day of the last menstrual period of the pregnant woman.”
— Ariz. Rev. Stat. § 36-2151(5) — 1 case
Tucson Women's Ctr. v. Arizona Med. Bd., 666 F. Supp. 2d 1091 (D. Ariz. 2009). “Section 36-2151 defines terms used in these other sections.”
— Ariz. Rev. Stat. § 36-2151(6) — 2 cases
Paul Isaacson v. Tom Horne, 716 F.3d 1213 (9th Cir. 2013). “Ariz. Rev. Stat. § 36-2151 (6). The stated purpose of the Act is to “[p]rohibit abortions at or after twenty weeks of gestation, except in cases of a medical emergency, based on the documented risks to women’s health and the strong medical evidence that unborn children feel pain…”
Isaacson v. Horne, 884 F. Supp. 2d 961 (D. Ariz. 2012). “2012) (to be codified as Ariz.Rev. Stat. § 36-2151(1)). “Gestational age” is defined as “the age of the unborn child as calculated from the first day of the last menstrual period of the pregnant woman.”
— Ariz. Rev. Stat. § 36-2151(9) — 1 case
Isaacson v. Mayes (D. Ariz. 2023). “58(G)(2), and “medical emergency” as “a condition that, on the basis of the physician’s 27 good faith clinical judgment, so complicates the medical condition of a pregnant woman 28 as to necessitate the immediate abortion of her pregnancy to avert her death or for which a 1…”
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