High-risk pregnancies are all, except?
Ref. The Short Textbook of Pediatrics. Pg 271
 
High risk pregnancy is one where the mother suffers from causes which are determined to her health or the fetal health. Some of the important factors are :

Age over 35 years
Elderly primi
More than 5 previous pregnancies
History of past stillbirths
Previous caesarean section
History of neonatal deaths
Haemorrhage and previous manual removal of placenta.
Placenta previa
Short stature below 140cms
Young primi <19years
History of infertility .
Systemic diseases –hypertension, RHD, Diabetes, Renal diseases, TB
Previous manual removal of placenta
Infertility
Twin
Obesity