如果一个人同时持有wp和dp，在新加坡怀孕了，需要割掉wp吗？

为什么不会有，现在申请wp的话，dp是可以保留的

DP holders who get a Work Permit:

Are required to hold on to both the DP and Work Permit. The Work Permit’s validity period will be tied to that of the DP
Can be of all nationalities (i.e. source requirements are waived)
Are not subject to the six-monthly medical examination, security bond or pregnancy restrictions.
Do not need medical insurance from their employers if they are already covered under a medical insurance plan that meets MOM’s prevailing minimum mandatory insurance coverage requirement.
https://www.mom.gov.sg/passes-and-permits/dependants-pass/working-in-singapore

自己看吧

划重点
Are not subject to the six-monthly medical examination, security bond or pregnancy restrictions.