how do you make sure a pregnancy results in an intelligent new born?

Nature and nurture.

Nature 1. Are you both of good genetic stock? Are both you and your partner bright people? If so, then your kid stands a better chance of inheriting genes to predispose him/her to being intelligent.

Nature 2. Have you had any karyotyping or other genetic tests done? If not, then you should do so and see if the kid has any genetic abnormalities (aneuploidy, deletions, etc).

Nurture 1. BREASTFEED!!! At least the first 6 months, and beyond 9 would be great.

Nurture 2. Read to the kid and spend a lot of time interacting with the child. Familiarize the child with speech and language by speaking normally (and clearly), and show the child words and letters. If you are multilingual, teach that kid as many languages as you can. This is the time they can absorb that information easily.

Nurture 3. Some TV is okay, but don't just set the child in front of the telly and leave him/her there. Be selective about the programming.

Nurture 4. Music lessons. As soon as that kid can read the alphabet, they should learn to read music. Music literacy can enhance mathematic ability later in life. Even if the child is an infant, s/he can hear well enough to benefit from music. Melody is very important.

Nurture 5. Preschool will further the child's education both intellectually and SOCIALLY. Don't neglect the value of social skills.

Reading aloud and playing lullabyes during pregnancy.

"in the last trimester of pregnancy, the prenate's learning state shows movement from abstraction and generalization to one of increased specificity and differentiation. During a bonding session using music, the prenate was observed moving her hands gently. In a special musical arrangement, where dissonance was included, the subject's reactions were more rhythmic with rolling movements. Similarly, in prenatal music classes, Sister Lorna Zemke has found that the fetus will respond rhythmically to rhythms tapped on the mother's belly.

From what research is telling us, we may presume that prenates would prefer to hear lullabies sung by their mothers, or selected slow passages of Baroque music such as Vivaldi, Telemann, and Handel which have a tempo resembling our own heart beat at rest. Recent research has shown that four month old infants demonstrate an innate preference for music that is consonant rather than dissonant (Zentner and Kagan, 1998). However, this allows great latitude in the selection of music which babies and their mothers might like to hear. Our ultimate objective, of course is to help create not a musical genius but a person well integrated in his physical, emotional, intellectual and spiritual self."

You can't insure ensure anything along those lines. There's always a possibility of things going wrong invitro. You can give your child (born and unborn alike) a chance at increased brain activity by reading to them, playing music and continuing to interact with them in a stimulating manner after birth.

there isnt much you can do as sometimes birth defects can happen even when a woman does everything perfectly.. theres not a big chance there will be something wrong... birth defects I am pretty sure are only 3% when the woman does everything she is supposed to. Just make sure she eats healthy not a whole lot of salt, NO soda or caffeine... eat healthy, get excercise and plenty of rest as well. She shouldnt expose herself to household cleaners for prolonged periods of time. and the obvious no smoking no drugs or alcohol.

And after they are born, just spend plenty of time working with them. Newborns develop differently, but you can do things to help with motor skills and hand eye coordination. There are special toys that they can play with to help with that... The main thing you should do is spend plenty of time with them and working with them.. I have a friend who had a newborn and they never spent time with her... she was very slow developmentally because no one ever took the time to play with her and teach her. which is sort of sad. Shes almost 3 years old and is barely talking. but if you spend plenty of your time with your child then it makes a big difference... also read to your baby, although they dont understand, lots of verbal stimulation helps them to learn to talk because they learn by example and by watching you...

Ask the doctor to suggest vitamins/supplements/foods that support brain development during pregnancy.

It's impossible for a new born to be intelligent. He can be healthy which can help in becoming intelligent. If you want your child to be intelligent you have to teach him. It's not hereditary.

Well you can probably have an intelligent child if you breast feed for a long time.

you cant control the intelligent thing but you can take vitamins while you are pregnant but its not gonna make your child smart you get what god gives you no matter what you do

I don't think anything is guaranteed in this world.

no offense, but don't you think that if we knew that, there'd be less morons around?