aperture of the female block portion. A second seal portion is produced from an elastomer disposed on the free edge of the first seal portion. A fastener sealingly engages the male block portion and the female block portion. The fastener causes the male block portion and the female block portion to deform the first seal portion and thereby provide a primary seal between the male block portion and the female block portion. The fastener also causes the male block portion and the female block portion to cooperate with the second seal portion and provide a secondary seal between the male block portion and the female block portion. The primary seal and the secondary seal militate against a leakage of a fluid from the block fitting.
There is a continuingIntroduction
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The desire to have children is associated with the creation of human beings. Surrogacy is one method used by infertile couples who wish to have a baby. The first legal surrogacy agreement was enacted in the mid-1970s. The first paid traditional surrogacy arrangement was conducted in the United States in 1980. In 1983, the first successful pregnancy occurred via egg donation. This event later led to the first gestational surrogacy in the United States in 1985 ([@B1], [@B2]). In a study reported the first surrogate gestational pregnancy that resulted in heated debates in the UK. In 1985, the UK established the Surrogacy Law ([@B3]) which permitted surrogacy under special circumstances. Therefore, the UK became one of the few European countries where a surrogacy contract was permitted under specific