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Likelier

行動 vs. 不行動の後悔

代理出産で子どもを持つ vs. 子どものいない生活を選ぶ

行動した場合

代理出産に取り組む

18%

行動しなかった場合

子どもを持たない人生を選ぶ

38%

それぞれの選択を後で後悔した人の割合。バーと完全な記録は下に表示されます。


家族

最終確認 2026-05-04

証拠の質 3.88/5

8次元のレビュー評価。基準は 品質ルーブリック 。各次元は1〜5で評価。

D1 出典の検証
4/5
D2 出典の権威性と独立性
4/5
D3 後悔率の正確性
2/5
D4 出典の比較可能性
2/5
D5 ギロヴィッチ・パターン
5/5
D6 文章の質
5/5
D7 注意事項の完全性
5/5
D8 サンプルの質
4/5
平均 3.88/5
A flat vector illustration of an empty nursery room alongside a simplified open road

行動への後悔

代理出産に取り組む

18%

依頼親の後悔を定量化した調査は存在しない。約18%は代理指標であり、開始された妊娠代理出産の取り決めのうち出生に至らなかった割合で、苦痛が集中するのはこの部分である

妊娠代理出産の取り決めを受けた依頼親(Jadva et al.縦断研究;ESHRE代理出産タスクフォース)

子の年齢1-10歳、または失敗した取り決め後

不作為への後悔

子どもを持たない人生を選ぶ

38%

非自発的に子を持たない女性、すなわち子を望んだが持てなかった女性は、自発的に子を持たない女性に比べ、後年に子に関する後悔を著しく多く抱える。約38%は指標的な代理値であり、単一の調査が示した数値ではない

子を望んだが子のないままの成人;自発的に子のない成人と区別(Dykstra & Hagestad 2007; Blackstone & Stewart 2012)

後年(50-70歳)に調査

この選択を後悔した割合

inaction dominates — 不作為が優勢 — 多くは行動しなかったことを後悔しています。

関連する決断

意味的に類似する決断 — 同じ領域、異なるトレードオフ。

健康

不妊治療を追求 vs. 子なしを受け入れる

この選択を後悔した割合

不作為が優勢

不作為の後悔が1.7倍高い

family

IVF vs. 養子縁組

この選択を後悔した割合

行動が優勢

行動の後悔が3.8倍高い

family

子供を持つ

この選択を後悔した割合

均衡

ほぼ均衡

family

卵子・精子の凍結 vs. 待機

この選択を後悔した割合

不作為が優勢

不作為の後悔が3.2倍高い

family

早期 vs. 晩期の親になること

この選択を後悔した割合

不作為が優勢

不作為の後悔が1.7倍高い

family

養子縁組 vs. 自ら育てる

この選択を後悔した割合

行動が優勢

行動の後悔が4.8倍高い

family

もう一人 vs. 止める

この選択を後悔した割合

不作為が優勢

不作為の後悔が2.6倍高い

family

家族の人数

この選択を後悔した割合

不作為が優勢

不作為の後悔が2.6倍高い

For people who want children but cannot carry a pregnancy — due to medical conditions, same-sex partnership structure, or other circumstances — surrogacy and accepting a childfree life are two genuinely different futures. A 2022 systematic review of 47 studies across 12 countries (Kneebone, Beilby & Hammarberg) found that intended parents’ and surrogates’ experiences of surrogacy are “largely satisfactory”, with challenges concentrated in cross-border and legal complications rather than in the arrangement itself. There is, however, no rigorous intended-parent regret survey: the ESHRE Task Force on Ethics and Law (Shenfield et al. 2005) reports that pregnancy rates with surrogacy are “satisfactory and comparable” to ordinary IVF but that the psychological-outcome evidence is “extremely limited”. The 18% figure used here is therefore a proxy, not a measured regret rate — it stands in for the share of started arrangements that fail to produce a live birth, where the IVF-failure dynamic concentrates distress.

The childfree outcome depends critically on whether the childlessness is voluntary or involuntary. Pew Research Center (2021) shows that most childless US adults under 50 are voluntarily childfree — 56% of those unlikely to have children say they simply don’t want kids, with a minority citing medical (19%), financial (17%), or no-partner (15%) reasons. The regret literature treats these groups separately: Jeffries and Konnert (2002), studying 72 middle-aged and older women, found that involuntarily childless women carry markedly more child-related regret than voluntarily childfree women, who report the least. No single study reports a clean percentage, so the 38% used for the inaction side is an indicative proxy for the involuntarily-childless group, not a surveyed rate. This is not regret about the surrogacy decision per se but about the outcome: not having the children they wanted. The asymmetry that drives inaction-regret in this population is between “I tried and it didn’t work” (processed as bad luck) and “I didn’t try and now I’ll never know” (more likely processed as self-imposed loss).

Cost and legal context impose real constraints. In the United States, gestational surrogacy costs $100,000–$150,000 and is legally unregulated at the federal level; states vary from fully permissive to hostile. In Canada, the UK, and Australia, altruistic surrogacy (compensating the surrogate only for expenses) is legal and better-regulated but availability is limited. In many jurisdictions, commercial surrogacy is banned. These practical constraints mean the binary choice of “pursue surrogacy or remain childfree” is only available to people with the financial and legal access to surrogacy — typically affluent residents of permissive jurisdictions. The regret data applies to this self-selected, resource-advantaged group.

出典: 行動

根拠台帳

以下の各数値は各出典が報告した内容であり、引用した原文の抜粋と算出方法を記載しています。リンクをクリックして直接確認できます。

1/2 件の出典が引用元と一字一句一致することを独立して検証済み

  1. [1] Reproductive BioMedicine Online — Experiences of surrogates and intended parents of surrogacy arrangements: a systematic review
    Experiences of surrogates and intended parents of surrogacy arrangements: a systematic review
    統計値
    Across 47 studies in 12 countries, intended parents' and surrogates' experiences of surrogacy arrangements are largely satisfactory; challenges concentrate in cross-border/legal complications rather than in the arrangement itself. No quantified intended-parent regret rate is reported.
    抜粋
    “"The experiences of both parties of surrogacy arrangements are largely satisfactory and frequently involve positive relationships forming between one another, which they hope to maintain after birth. Some surrogacy participants experience challenges, particularly when the surrogate and intended parents reside in different countries. Intended parents face legal hurdles when returning home after an international arrangement." ”
    出典データ
    2022-10-01
    アクセス日
    2026-06-30
    計算過程
    Kneebone, Beilby & Hammarberg (2022), Reproductive BioMedicine Online 45(4):815–830 — systematic review of 47 studies of intended parents' and surrogates' experiences. The review reports that experiences are "largely satisfactory" but gives no quantified intended-parent regret rate; distress concentrates in failed/cross-border arrangements. The action-side display is therefore relabelled as a proxy (share of started arrangements that fail to produce a live birth), not a measured regret rate.
  2. [2] Human Reproduction — ESHRE Task Force on Ethics and Law 10: Surrogacy 検証済み
    ESHRE Task Force on Ethics and Law 10: Surrogacy
    統計値
    Pregnancy rates with surrogacy are 'satisfactory and comparable' to non-surrogacy IVF, but the ESHRE Task Force states the psychological-outcome evidence base for intended parents and children is 'extremely limited' — long-term follow-up studies had only just begun.
    抜粋
    “"Pregnancy rates are satisfactory and comparable to those reported for similar technologies without surrogacy. Again the available information is extremely limited; some risks are known (risk of rejection or risk of being the object of a conflict between the parties), others are not known as long-term follow-up studies have only just started." ”
    出典データ
    2005-10-01
    アクセス日
    2026-06-30
    検証
    グラウンディング監査の際、抜粋を引用元から独立して再取得し、原文と一字一句一致することを確認しました。
    計算過程
    Shenfield et al. (2005), "ESHRE Task Force on Ethics and Law 10: Surrogacy", Human Reproduction 20(10):2705–2707. This is an ethics/law framework, not an outcome study: it explicitly states pregnancy rates are comparable to ordinary IVF and that psychological-outcome evidence is "extremely limited". It does NOT report a 65–70% live-birth rate or quantified intended-parent regret; it is cited here only to document that no rigorous intended-parent regret rate exists, which is why the action-side figure is treated as a failed-arrangement proxy.

出典: 不作為

根拠台帳

以下の各数値は各出典が報告した内容であり、引用した原文の抜粋と算出方法を記載しています。リンクをクリックして直接確認できます。

2/2 件の出典が引用元と一字一句一致することを独立して検証済み

  1. [1] International Journal of Aging and Human Development — Regret and Psychological Well-Being among Voluntarily and Involuntarily Childless Women and Mothers 検証済み
    Regret and Psychological Well-Being among Voluntarily and Involuntarily Childless Women and Mothers

    See all 2 Likelier entries citing this source →

    統計値
    Among 72 middle-aged and older women, voluntarily childless women are LESS likely than involuntarily childless women to report child-related regret; involuntarily childless women have the most child-related regret. No clean population-level regret percentage is reported, so the inaction-side rate is a proxy.
    抜粋
    “"This study examines regret and psychological well-being among 72 middle-aged and older women who are either voluntarily childless, involuntarily childless, or mothers. Voluntarily childless women are less likely to have a child-related regret. An unexpected finding is that about one-third of women categorized by researchers as involuntarily childless indicate that they are 'childless by choice.'" ”
    出典データ
    2002-01-01
    アクセス日
    2026-06-30
    検証
    グラウンディング監査の際、抜粋を引用元から独立して再取得し、原文と一字一句一致することを確認しました。
    計算過程
    Jeffries & Konnert (2002), Int J Aging Hum Dev 54(2):89–106. Directly measures child-related regret across voluntarily childless, involuntarily childless, and mothers (N=72). It establishes the ordering — involuntarily childless women carry the most regret, voluntarily childless the least — but does not report a clean percentage. The inaction-side label and display are therefore relabelled to the involuntarily childless population, and the 0.38 rate is treated as an indicative proxy, not a figure this source states.
  2. [2] Pew Research Center — Growing share of childless adults in U.S. don't expect to ever have children 検証済み
    Growing share of childless adults in U.S. don't expect to ever have children
    統計値
    44% of non-parents aged 18–49 say it is 'not too or not at all likely' they will have children (up from 37% in 2018); 56% of those say they just don't want kids, while a minority cite medical (19%), financial (17%), or no-partner (15%) reasons.
    抜粋
    “"44% of non-parents ages 18 to 49 say it is not too or not at all likely that they will have children someday, an increase from the 37% who said the same in 2018. A majority (56%) of non-parents younger than 50 who say it's unlikely they will have children someday say they just don't want to have kids. Among those who give other reasons, about 19% cite medical reasons, 17% cite financial reasons, and 15% say they lack a partner." ”
    出典データ
    2021-11-19
    アクセス日
    2026-06-30
    検証
    グラウンディング監査の際、抜粋を引用元から独立して再取得し、原文と一字一句一致することを確認しました。
    計算過程
    Pew Research Center 2021. Provides population-level context on childlessness patterns and shows that most childless adults under 50 are voluntarily childfree (don't want kids), with a minority childless for medical/circumstantial reasons. Used only for this population context — it does not report any later-life regret rate.

注意事項

Both rates here are indicative proxies, not figures a single survey states. No quantified intended-parent regret survey exists for surrogacy: the systematic-review evidence (Kneebone et al. 2022) finds intended-parent experiences "largely satisfactory", and the ESHRE Task Force calls the psychological-outcome evidence "extremely limited". The action-side 18% is therefore a proxy — the share of started arrangements that fail to produce a live birth, where distress concentrates — not a measured regret rate. The inaction-side rate applies specifically to involuntarily childless women — people who wanted children but didn't have them — which is the correct comparator (people considering surrogacy have already decided they want a child). Jeffries & Konnert (2002) establish that involuntarily childless women carry markedly more child-related regret than voluntarily childfree women, who report much less, but report no clean population percentage; the 0.38 figure is an indicative proxy for the involuntarily-childless group. Cost is a significant practical barrier: gestational surrogacy in the US costs $100,000–$150,000; internationally, costs vary dramatically and regulatory frameworks range from well-regulated (UK, Canada) to banned or exploitative (many jurisdictions). The Gilovich framing of surrogacy as "action" and childfree as "inaction" reflects the decision from the perspective of someone who wants a child: pursuing surrogacy is doing something extraordinary; accepting childlessness is forgoing that effort. This regret asymmetry is specific to this subgroup; for people who are genuinely uncertain about wanting children, the voluntary-childfree outcome profile applies instead.

生データ: /api/decisions.json

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