Conservative Judaism, while generally encouraging its members to follow the traditional Jewish views on birth control has been more willing to allow greater exceptions regarding its use to fit better within modern society.
Regulations regarding contraception affect the traditional streams of Judaism (including the Haredi and Modern Orthodox varieties) more so than others because of their strict adherence to Halakhah, or Jewish law.
These regulations affect liberal strains of Judaism (including the Reform, Reconstructionist, and Conservative movements; particularly in Western society) much less, where the emphasis is on applying Halakhah to modern life rather than observing it strictly.
further consider the possibility (generally not accepted) that a union that by definition cannot lead to pregnancy would amount to "spilling seed", the sin of Onan ( Genesis 38:9–10).
[1] When Orthodox Jewish couples contemplate the use of contraceptives, they generally consult a rabbi competent on this topic who evaluates the need for the intervention and which method is preferable from a halachic point of view.
[citation needed] Many Modern Orthodox authorities are inclined to permit contraception for a broad array of reasons, with some arguing that a couple may decide to delay procreation even without specific rabbinic permission.
[citation needed] In the Mishneh Torah, Hilchot Issurei (21:18)–which is part of the Maimonides' Law Code from the medieval period–it is stated that expending semen for no purpose is forbidden as a man holds the sole responsibility in the act of procreation.