Dear Ashima, its unfortunate you had to go through such a hard time through your pregnancies. Let me help you understand some things.
1.
High blood pressure during
pregnancy with a
seizure attack and from what looks like multi organ failure ( according to your description)in your previous pregnancy, puts you under extremely high risk to manage your pregnancy safely. You must understand the consequences of future pregnancy on your own health and well being ( the functioning of all important organs like heart, brain,
kidney,
liver may be compromised and can be even fatal or life threatening) before attempting one. So you must be fully aware and equipped for any potential consequences of it.
2. There could be many reasons why high blood pressure happens in pregnancy. Some women who has a family history of
hypertension, and have crossed 35 years are more susceptible to it.
And a number of genes are suspected to cause it.
Yes, as the baby shares genes of both mother and father, now you can think your body is temporarily handling your husband's genes. Hypertension can develop if your husband's genes are not efficiently handled.( that's what your doctor explained).This can result in altered placental development and reduced blood supply to the baby. The baby may be thus may be growth restricted, and is prone for premature delivery, and its consequences.
3. As even donor inseminations may result in similar condition it is extremely hard to predict if that can be free of hypertensive complications.
Hence I suggest you to be rational and take a wise decision if you want to conceive again and obtain very good
prenatal care when you attempt it.
Hope this information helped. Good luck.