In the beginning God created man in his own image, in the image of God created he him; male and female created he them.
Gen 1:28 And God blessed them, and God said to them, Be fruitful, and multiply, and replenish the earth, and subdue it: and have dominion over the fish of the sea, and over the fowl of the air, and over every living animal that moveth upon the earth.
But because of their wickedness God cause it to rain upon the earth forty days and forty nights: and every living substance that He have made will be destroyed from the face of the earth.
1 Pet 3:20 Who formerly were disobedient, when once the long-suffering of God waited in the days of Noah, while the ark was preparing, in which few, that is, eight souls, were saved by water.
Gen 9:1 And God blessed Noah and his sons, and said to them, Be fruitful, and multiply, and replenish the earth.
In this present situation where population exploded in uncontrollable proportion, is the command be fruitful and multiply still in effect?
Family planning is a term referring to methods in accordance with the requirements for sexual behavior in keeping with the dignity of the human person and including the use of other methods of birth control.
Periodic abstinence are the only methods deemed moral by some quarters for avoiding pregnancy and limits sexual intercourse to naturally infertile periods. But the Scripture says:
1 Cor 7:29 But this I say, brethren, The time is short. It remaineth, that both they that have wives, be as though they had none;
It does not however defraud one another to have sexual intercourse except with consent for a time, that ye may give yourselves to fasting and prayer; and come together again, that Satan may not tempt you for your incontinence.
1 Cor 7:4 The wife hath not power of her own body, but the husband: and likewise also the husband hath not power of his own body, but the wife.