In this way, the entire description of descent into embryo is explained in keeping with the purpose with which the chapter was initiated i.e. to provide knowledge regarding the formation of embryo. By obtaining this knowledge one can help to way out to the factors which are responsible for the proper growth of the fetus and avoiding the factors which come in the way of its proper development.
[Summary] Competent cause (nimitta), soul, prakriti, gradual development of the fetus in uterus and the factors responsible for the growth are the five auspicious things for the conception.
अजन्मनि च यो हेतुर्विनाशे विकृतावपि| इमांस्त्रीनशुभान् भावानाहुर्गर्भविघातकान् ||४३||
The factors which are responsible for the prevention of conception, damaging the fetus and teratological abnormalities are three inauspicious factors responsible for garbhavighataka or destructors of fetus.
अवाप्त्युपायान् गर्भस्य स एवं ज्ञातुमर्हति| ये च गर्भविघातोक्ता भावास्तांश्चाप्युदारधीः ||४५||
The physician having intelligence, kindness should know those factors which help in the formation and growth of the fetus and also those which are responsible for the destruction of the fetus.