Objective To inquire into the reasons and relevant factors of unwilling gestation of adolescents and to offer basis of sexual health and medical care of adolescents. Method We use unregistered and self-stated questionnaire designed by ourselves. Content involves the general condition

sexual contraception knowledge

sexual ideas

sexual attitude and gestation reason of investigated objects

and so on. By using questionnaire we investigate 32 adolescents for unwilling gestation selected. Results Among investigated persons students contain 37.5 %

migrant workers contain 25 %. Gestation rate for the ages from 19 to 23 is the maximum. For first sexual practice the youngest age is 17. The first three places of knowledge resource of sexual contraception: 43.8 % learn from network media

31.3 % from school

and 15.6 % from sexual fellows. For the recognition that emergency contraception and induced abortion may result in sterility

the correctness rate contains 68.8 %. Among unwilling gestation persons the sexual fellows of 90.6 %are their lovers

those of 6.3 % are common friends

and that of 3.1 % is one-night lover. 62.5 % consider that the occurrence of the sexual behavior is the inevitable result of love. 75 % have not adopted contraception. 25 %break down to avoid pregnancy. 96.9 % mean to need to study the knowledge of contraception. Conclusion Unwilling gestation of adolescents has already become unavoidable society problem; The lacks of sexual education is the main reasons. Sexual health education of adolescents must pay attention on self-protection education and impartation of knowledge of sexual contraception.