Give me an example of how new species arise
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Evolution over millions of years, This could happen due to selection pressures like predators, change in environments for example the industrial revolution and how black moths were more in favor than white moths because the could blend in with the soot, natural selection also can cause this as well as bottleneck effect and genetic drift.

New species arise due to the evolution of some individuals of a prior species. For example, it is beieved that humans descend from gorillas. This most likely occurred because some gorillas were isolated and evolved into humans in a long span of time due to their environment

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In order to understand the problems of unwanted infertility in a country — the gambia — where the desire for children and the fertility is very high, a population-based survey was undertaken. all infertile women in 24 randomly selected enumeration areas were assessed. the study included a review of the problems faced and coping mechanisms employed by infertility clients and types of health care available for infertile couples in the different types and levels of the formal and traditional health system. half of the infertile couples failed to seek formal health care, and they have to reach a certain level of care in order to be properly managed. alternative care is often sought. child fostering is also a frequent solution to childlessness. in-depth interviews revealed that traditional care like healers and spiritual leaders are frequently consulted long before formal health care. this delay could be a problem in those cases where infertility is caused by infections.