It isn't illegal to chew gum, but it is illegal to bring them into Singapore or sell them except for medical purposes. Since you can't buy gum (selling is illegal) there's no way to chew them so it's almost as good as not being able to chew gum. See this: http://www.customs.gov.sg/leftNa...
Definition: In Vitro. A study done in vitro, in contrast, looks at how a drug or procedure responds in the confines of a test tube or laboratory dish. Clinical trials or medical studies may be performed either in vivo or in vitro.
Medications are a regular and normal part of infertility treatments and the in vitro fertilization (IVF) procedure.These medications are used to prepare the body for treatment and to increase the probability that more healthy eggs are released from the ovaries.edications are a regular and normal part of infertility treatments and the in vitro fertilization (IVF) procedure.