Pregnancy can bring on acne or make existing acne worse. The surge of hormones during pregnancy results in the skin secreting more oils. This oily substance (sebum) combined with dead skin cells can clog pores. The most affected areas seem to be the face, neck, back, chest and shoulders. Stress can make acne breakouts worse, so in addition to using an oil-free cleanser and eating a healthy diet, be sure to take steps to relax and take care of your mental and emotional health.
HLA tests could be done with 80% accuracy, but could not distinguish between close relatives. Genetic parental testing technology advanced further with the isolation of the first restriction enzyme in 1970. Highly accurate DNA parental testing became available in the 1980s with the development of RFLP.
An Overview of the PCR Lab Test. The PCR lab test (polymerase chain reaction) was developed to overcome the obstacle of quickly replicating DNA for research use. Developed in the 1980s, the PCR lab test is widely applied in medicine, from identifying new viruses to testing for bacterial illness. An alternate application is criminology, where it is used to help find potential perpetrators.