I would, personally, look at vitro in an and unnatural way. Vitro used for experimental reasons, such as disease control and ect, is still unnatural and takes women as test subjects and this should not be accepted. Adoption is always a choice.
The act of taking male sperm cells (donated), taking out an egg of a woman and self fertilising it and replanting it. It is usually done to discourage things like genetic birth defects, but it can also be done as a alternative to adoption if no sex can be present.