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アメリカの出生率が過去最低に達したことを示す報告書が発表されました。CDC(疾病管理及び予防局)のデータによると、2025年に米国で生まれた子供数は4,316,233人から3,606,400人に減少し、71万人に及ぶ差が出ています。この数字の変化には、経済的要因や文化的な影響、女性の教育と避妊手段の普及が関与していると考えられています。
マサチューセッツ大学ロサンゼルス校の人口研究センター所長であるマーサ・ベイリー博士は、「20代の若年層での出生率の減少が顕著です。これらの女性たちが遅くに子供を持つ可能性も考慮すべきです」と述べています。
また、10代の妊娠出産率が7%減少したことも注目されます。バイナ・アリソン医師は、「性行為の頻度が下がり、避妊手段の使用が増えていることから、青少年の妊娠率が低下していることが影響していると考えられます」と指摘しています。
この報告書にはネガティブな面もありますが、10代の出生率の減少は contraception の利用増加や堕胎手術へのアクセスにより子供出産を防ぐ努力が効果的であるという示唆があります。
An anonymous reader quotes a report from NPR: Women in the U.S. gave birth to roughly 710,000 fewer children last year compared with the nation's peak in 2007, according to preliminary data released (PDF) this week by the Centers for Disease Control and Prevention. Lead researcher Brady Hamilton, a demographer with the CDC's National Center for Health Statistics, said the latest one percent drop in "general fertility" from 2024 to 2025 is part of a long-running downward trend. "Since 2007, there's been a decline in the general fertility rate [in the U.S.] of 23%," Hamilton told NPR.
The impact of that change in real numbers is sizable: In 2007, there were 4,316,233 babies born. Last year, even though the nation's population as a whole is larger, there were only 3,606,400 newborns. There's no consensus over why women and couples have shifted their behavior so significantly. Some experts point to economic factors, others say cultural influences, and better access to education and contraception for women are driving the change.
"We're seeing big drops in fertility rates for young women, teenagers and women in their 20s," said economist Martha Bailey, head of the California Center for Population Research at the University of California, Los Angeles. "What's not yet clear is whether or not those same women will go on to have children later on."
"People are having the number of children they want and that they can afford at a time that makes the most sense for them," she said. "What I don't think anyone is in favor of is a Handmaid's Tale type policy regime, where we're trying to talk families into having children they don't want."
One silver lining in the data is the 7% decline in teen pregnancies in 2025. Bianca Allison, pediatrician and associate professor at the University of North Carolina School of Medicine, said: "What is actually affecting the birth rates are likely lower rates of teen pregnancy overall, which is in the context of higher use of contraception and lower sexual activity for youth, and then also continued access to abortion care."
Read more of this story at Slashdot.