為了減少青少年之生育，我們將民國六十七年有登記為第一胎出生之二十歲以下生母研究其經濟社會學上之特徵，包括其年齡、婚姻狀況、教育、職業、家庭背景以及對家庭計畫之知識、態度及行為。本研究係以問卷做家庭訪視調查，計有786人完成訪問。 其結果如下：1.百分之九十二點七其生育年齡在十七歲至十九歲。 2.她們之教育程度比同齡者低。 3.百分之九十三點五其結婚年齡在十六載至十九載。 4.僅百分之八點四之生育係未婚的，且愈年青的生母，未婚生育之比率愈高。訪視時有百分之三點一仍未婚，百分之一點四離婚，百分之零點七分居。5.未生育前有百分之八十九有工作，生育後僅百分之三十點五有工作，工作性質一半是屬生產、運輸工作人員，其他是服務、買賣及佐理工作人員。6.其配偶有百分之十四亦係二十歲以下，但未婚生育者中其配偶亦係二十歲以下則佔百分之十五點九。婚後有百分之十三點六配偶要當兵，不過其他大部分之配偶均有工作。7.其家庭背景均屬中下，平均家庭收入每月約一萬元。 8.有百分之三十五點九者從十五歲起就不與父母住而與親朋或單獨住。 9.年齡愈小之生母，或其父親之教育程度愈低者，則其愈早交男朋友，且有關之生育知識亦愈欠缺。10.婚前懷孕組比婚後懷孕組，其父親之教育程度係文盲或大專教育程度較偏差多。 11.百分之九十四點一在第一次性行為沒有使用避孕方法，百分之七十九點五有婚前性行為故本次生育係屬婚前懷孕佔百分之六十七點四。12.若婚前發生懷孕，大部分均希望結婚生子，比係受了家庭人員態度之影響或人工流產之獲得有困難之影響，故她們就當了年輕的媽媽，不過生了一個小孩後，百分之六十六點九均有採用某種避孕方法(另有百分之十二點二又孕，百分之二十點九未避孕〉。

In order to reduce the teenage pregnancies, we investigated the socio-economic characteristics as well as KAP in regard to family planning among 786 teenage mothers with their first births registered in Taipei city in 1978 through household interviews. Significant personal factors like younger age, less education, lack of knowledge of family planning, conservative attitude to use contraception before first delívery and conservative attitude toward premarital pregnancy etc. are examined. Significant others’ factors like parent's education, family attitude toward premarital pregnancy etc, and situational factors like migration to city, working in factories, restaurants, etc. exposure to premarital sexual contact, use of contraceptives, limited availability of artificial abortion were studied. These factors contribute directly or indirectly to accepting the premarital pregnancy or the pregnancy soon after marriage even during the teenage years. As a result, the teenager became a mother. Some socio-economic and health consequences are reviewed and discussed.