During the 20th century alone, the population in the world has grown from 1.65 billion to 6 billion. In 1970, there were roughly half as many people in the world as there are now. Because of declining growth rates, it will now take over 200 years to double again.
In some cases you can take a different medicine that doesn't cause erection problems. Taking prescription medicine that can help you get erections. These include pills such as sildenafil (for example, Viagra), tadalafil (for example, Cialis), and vardenafil (for example, Levitra).
LH and FSH deficiency in Men: LH and FSH deficiency may cause loss of libido (interest in sexual activity), difficulty in achieving and sustaining an erection and infertility due to a low sperm count, and osteoporosis, which can result in a tendency to develop bone fractures.