Nausea (feeling sick) and vomiting during pregnancy is normal whether you have PKU or not. It is often worse on waking in the morning but can happen at any time of day. Not all women will get morning sickness, but it is very common in early pregnancy and usually clears up by 16-20 weeks of pregnancy.
In PKU, pregnancy associated nausea and vomiting can affect your appetite and ability to take your protein substitute. If you are not managing to take your protein substitute or enough energy (calories) your phe levels will increase.
If you are feeling sick or struggling to take your protein substitute it is important to tell your metabolic team as soon as possible. Nausea and vomiting can often be managed more proactively in pregnancy and PKU. Anti-sickness medications called anti-emetics may be recommended to control the nausea and vomiting to help limit any rise in phe levels. Sometimes an admission to hospital is required to assess the condition and determine the best course of management for you and your baby and rule out any other cause for the nausea and vomiting. For example, urinary infections.
Here are some tips for dealing with nausea or sickness in a PKU pregnancy which can be followed in discussion with your dietitian:
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