(a) True: Abortions can occur spontaneously due to various reasons like genetic abnormalities, hormonal imbalances, infections, etc.
(b) False: Infertility is defined as the inability to produce viable offspring and can be due to abnormalities or defects in either the male or female partner, or both.
(c) True: Complete lactation, when the baby is exclusively breastfed, can act as a natural method of contraception. This is because it suppresses the release of hormones responsible for ovulation, thereby preventing pregnancy.
(d) True: Creating awareness about sex-related aspects like reproductive anatomy, puberty, contraception, sexually transmitted diseases, etc., can help people make informed decisions about their reproductive health, leading to better health outcomes.