The omen spoke of aṣṭamo garbhaḥ, referring to the eighth pregnancy, but did not clearly say whether the child was to be a son or a daughter. Even if Kaṁsa were to see that the eighth child of Devakī was a daughter, he should have no doubt that the eighth child was to kill him.
(Srimad Bhagavatam-----10:1:34-----purport).

Kaṁsa feared Devakī's existence because after her eighth pregnancy she would give birth to a son who would kill him. Vasudeva, therefore, to assure his brother-in-law the utmost safety, promised to bring him all the sons. He would not wait for the eighth son, but from the very beginning would deliver to the hands of Kaṁsa all the sons to which Devakī would give birth. This was the most liberal proposition offered by Vasudeva to Kaṁsa.
(Srimad Bhagavatam-----10:1:54-----purport).

From another point of view, Vasudeva and Devakī were very pleased when they understood that the Supreme Personality of Godhead, Kṛṣṇa, would come as their eighth son. Vasudeva, a pure devotee of the Lord, was eager to see Kṛṣṇa appear as his child from the eighth pregnancy of Devakī. Therefore he wanted to deliver all the children quickly so that the eighth turn would come and Kṛṣṇa would appear. He begot one child every year so that Kṛṣṇa's turn to appear would come as soon as possible.
(Srimad Bhagavatam-----10:1:58-----purport).

After Yogamāyā transferred the seventh child of Devakī to the womb of Rohiṇī, the Supreme Personality of Godhead appeared within the heart of Vasudeva and transferred Himself into the heart of Devakī. Because the Lord was present in her heart, Devakī, as her pregnancy continued, appeared effulgent. Upon seeing this effulgence, Kaṁsa was full of anxiety, but he could not harm Devakī because of their family relationship. Thus he began indirectly thinking of Kṛṣṇa and became fully Kṛṣṇa conscious.
(Srimad Bhagavatam-----10:2:----summary).

When a pure devotee always fears material association, his real position of bhakti is manifested, and he naturally becomes uninterested in material enjoyment. When the six sons of Marīci are killed by such fear and one is freed from material contamination, within the womb of bhakti the Supreme Personality of Godhead appears. Thus the seventh pregnancy of Devakī signifies the appearance of the Supreme Personality of Godhead. After the six sons Kāma, Krodha, Lobha, Moha, Mada and Mātsarya are killed, the Śeṣa incarnation creates a suitable situation for the appearance of the Supreme Personality of Godhead. In other words, when one awakens his natural Kṛṣṇa consciousness, Lord Kṛṣṇa appears. This is the explanation given by Śrīla Viśvanātha Cakravartī Ṭhākura.
(Srimad Bhagavatam-----10:2:8-----purport).

The real story of what happened after Yogamāyā attracted the child of Devakī into the womb of Rohiṇī in the seventh month of Rohiṇī's pregnancy is described as follows in the Hari-vaṁśa. At midnight, while Rohiṇī was deeply sleeping, she experienced, as if in a dream, that she had undergone a miscarriage. After some time, when she awoke, she saw that this had indeed happened, and she was in great anxiety. But Yogamāyā then informed her, "O auspicious lady, your child is now being replaced. I am attracting a child from the womb of Devakī, and therefore your child will be known as Saṅkarṣaṇa."
(Srimad Bhagavatam-----10:2:15-----purport).

Kaṁsa thought: What is my duty now? The Supreme Lord, who knows His purpose (paritrāṇāya sādhūnāṁ vināśāya ca duṣkṛtām Bg. 4.8), will not give up His prowess. Devakī is a woman, she is my sister, and moreover she is now pregnant. If I kill her, my reputation, opulence and duration of life will certainly be vanquished.
(Srimad Bhagavatam-----10:2:21-----purport).

It appears that Kaṁsa, although a great enemy of the Supreme Personality of Godhead, was aware of the Vedic culture and conscious of the fact that the soul transmigrates from one body to another and that one suffers in the next life according to the karmas of this life. Therefore he was afraid of killing Devakī, since she was a woman, she was his sister, and she was pregnant. A kṣatriya becomes famous by performing heroic acts. But what would be heroic about killing a woman who, while confined in his custody, was under his shelter? Therefore, he did not want to act drastically by killing Devakī.
(Srimad Bhagavatam-----10:2:21-----purport).

Kaṁsa had previously excused Devakī because he thought that a woman should not be killed, especially when pregnant. But now, by the influence of māyā, he was prepared to kill a woman—not only a woman, but a small, helpless newborn child. Devakī wanted to save her brother from this terrible, sinful act. Therefore she told him, "Don't be so atrocious as to kill a female child. Let there be all good fortune for you." Demons can do anything for their personal benefit, not considering what is pious or vicious. But Devakī, on the contrary, although safe because she had already given birth to her own son, Kṛṣṇa, was anxious to save the daughter of someone else. This was natural for her.
(Srimad Bhagavatam-----10:4:4-----purport).

Even before the child is born, when the mother is pregnant, many recommended ritualistic ceremonies are performed. For example, when the child has been within the womb for three months and for seven months, there is a ceremony the mother observes by eating with neighboring children. This ceremony is called svāda-bhakṣaṇa. Similarly, before the birth of the child there is the garbhādhāna ceremony.
(Srimad Bhagavatam-----10:7:4-----purport).

In Vedic civilization, childbirth or pregnancy is never regarded as a burden; rather, it is a cause for jubilation. In contrast, people in modern civilization do not like pregnancy or childbirth, and when there is a child, they sometimes kill it. We can just consider how human society has fallen since the inauguration of Kali-yuga. Although people still claim to be civilized, at the present moment there is actually no human civilization, but only an assembly of two-legged animals.
(Srimad Bhagavatam-----10:7:4-----purport).

With His followers in the renounced order, however, Lord Caitanya was very strict. He even banished Junior Haridāsa, an important kīrtana leader, for glancing lustfully at a woman. The Lord told him, "You are living with Me in the renounced order, and yet you are looking at a woman with lust." Other devotees of the Lord had appealed to Him to forgive Haridāsa, but He replied, "All of you can forgive him and live with him. I shall live alone." On the other hand, when the Lord learned that the wife of one of His householder devotees waspregnant, He asked that the baby be given a certain auspicious name. So while the Lord approved of householders having regulated sex, He was like a thunderbolt with those in the renounced order who tried to cheat by the method known as "drinking water under water while bathing on a fast day." In other words, He tolerated no hypocrisy among His followers.
(Sri Caitanya Caritamrta----introduction).