One verse

Srimad Bhagavatam 6.15.4

6.15.4

यथा धानासु वै धाना भवन्ति न भवन्ति च । एवं भूतानि भूतेषु चोदितानीशमायया ॥ ४ ॥

yatha dhanasu vai dhana bhavanti na bhavanti ca evam bhutani bhutesu coditanisa-mayaya

yatha
just as
dhanasu
through seeds of paddy
vai
indeed
dhanah
grains
bhavanti
are generated
na
not
bhavanti
are generated
ca
also
evam
in this way
bhutani
the living entities
bhutesu
in other living entities
coditani
impelled
isa-mayaya
by the potency or power of the Supreme Personality of Godhead.

When seeds are sown in the ground, they sometimes grow into plants and sometimes do not. Sometimes the ground is not fertile, and the sowing of seeds is unproductive. Similarly, sometimes a prospective father, being impelled by the potency of the Supreme Lord, can beget a child, but sometimes conception does not take place. Therefore one should not lament over the artificial relationship of parenthood, which is ultimately controlled by the Supreme Lord.