Pregnancy



The Sims 2 and The Sims 3 were, after all, designed to be generation games. This is how you start a generation...

Conception
To get a Sim pregnant, the mother and father must "Try for Baby". This can be done in any place where WooHoo is possible and as long as the couple is fertile. When trying for a baby, there is a possibility that the Sim will not get pregnant, but if she does then you will hear a lullaby notifying that conception has just happened. During conception, the number of babies born is chosen (single or natural twins).

Infertile Couples
The following are scenarios in which the couple(s) can NOT produce a child without cheats/hacks:
 * They are a homosexual couple.
 * Female of couple is not an adult or is nearing elder-hood.
 * Male is too young
 * One of the couple is a zombie, Servo or other infertile creature.
 * Female is already pregnant.
 * Female is not a controllable character on that lot, or the female does not live in the neighborhood.
 * That lot has already reached the maximum number of Sims it can have (including unborn Sims).

In these scenarios, only the option to WooHoo will appear, except for teenagers and younger who cannot WooHoo.

Meeting Aliens
When your male looks through the telescope, there is a chance he might get abducted by aliens. If he does, a cutscene will show him being abducted by a UFO. After the first cutscene, everyone on the lot will come to worry about him at the telescope. They will all get the memory of him meeting aliens (which is good for the Sims with Knowledge). His motives will be crazy while he is missing. After a few Sim hours, he will return in a cutscene and he will panic. He will soon learn that he is pregnant.

Duration
All pregnancies last 3 days in The Sims 2 and The Sims 3, with the exception of using cheats which can reduce the gestation period to a mere 2 hours in simtime (which applies only to The Sims 2).

First Trimester
The first trimester lasts one day.

During this trimester the parent will suffer from morning sickness, in which they will run to the toilet periodically to throw up, with a thought bubble showing a pacifier and a question mark. They do not always throw up when pregnant. As a Sim is pregnant their motives will drop at an increased rate.

Second Trimester
The second trimester lasts one day.

At some point in the day the parent will attract the player's attention and change appearance. Their abdomen will enlarge and they will begin to wear maternity clothing. The bulge is nearly non-existent in The Sims 3, but progressively grows larger rather than the distinct steps. Their needs still drop at an accelerated rate. The parent will be placed on maternity leave if they have a job. The carpool will not appear. There will be new social interactions, "Rub Belly" and "Talk to Belly" "Feel Tummy", "Listen to Tummy", and "Talk to Tummy", and the pregnant Sim may "Ask to Feel Tummy". The pregnant Sim and father can announce the pregnancy to others.

From now until the baby is born, pregnant Sims can also expect to have cravings, in the form of more "Eat..." wants/wishes for specific foods.

Third Trimester
The third trimester lasts one day.

The parent will get the attention of the player and the abdomen will enlarge again. They can no longer drive, take a taxi, use the swing, hot tub or use the electro dance sphere from Nightlife. They will suffer from mood swings, in which the outcome of Social Interaction between the pregnant Sim and another will change.

Birth
On the last day of the pregnancy the Sim will attract the viewer once again and go into 'labour'. This is an autonomous action and all Sims on the lot will be drawn to the Sim to 'panic'. In The Sims 3 the pregnant Sim can also be taken to the hospital. (There is no ambulance). In The Sims 2 a screen will come up with the message 'there's a new family member on the way...' or 'there are TWO new family members on the way...' at which time the genetics and gender of the new baby/s are being arranged. If the special camera is enabled a cinematic will commence showing the birth of the baby, or the Sim will just turn around on the spot and... bam! A new family member is born. In The Sims 3 a little pop-up will say: 'The baby is being born! Make sure your sim is at the hospital or at home!' If your sim goes to the hospital, you won't be able to see anything, but you can still hear the birth take place. If you stay at home, your sims will turn on the spot, and there's your new little family member!

You will then be able to name the baby.

Multiple Births
The Sims 3 allows for the birth of both twins and triplets while The Sims 2 only allows for twins.

Twins
Twins are the only multiple birth that happens in The Sims 2. Twins are generated the same way as single babies, so they will look about as much like each other as normal siblings do--from nearly identical to widely different. With, for example, a light-skinned mother and dark-skinned father, the twins can have different skin colors. However, some pre-made twins, such as the Pleasant twins, are identical; and it is of course possible to make identical Sims in CAS.

Every pregnancy has a low chance of producing natural twins. Most Sims have about a 10% chance of having twins, although if a parent is a twin themselves, the chances increase a bit. This is decided at the moment of conception, so, unlike gender and genetics, exiting and reloading the lot will not change the number of babies born.

Triplets/Quadruplets
In The Sims 2, under normal circumstances it is NOT possible to have triplets, quadruplets or more. However, you may download third-party hacks to ensure the birth of triplets or quadruplets. When forcing triplets or quadruplets the game informs players that the Sim in question has birthed two babies despite the actual number. Players are still able to name each child, though, as the option pops up twice.

Increasing Multiple Birth Odds

 * The cheat "forcetwins" which, when typed in while the pregnant parent is selected, will ensure twin birth. ( and later.)
 * A pregnant Sim can eat cheesecake, which gives a near-100% chance of twins.
 * The ultimate Lifetime Aspiration Reward for Family Sims is "Super Fertility", which greatly increases the chance of having twins for the rewarded Sim and their spouse. The benefit will decide the number of children born 25 hours after conception (at the time of the first belly expansion).
 * You can download third-party hacks from other websites, which give you the option to force your Sim to have twins.
 * Sims can buy the reward "Fertility Treatment" for 10,000 lifetime reward points. Fertility Treatment makes it more likely that "Try For Baby" will work, and also increases chances of twins and triplets.
 * Watching the kids channel on TV or listening to the children's music station on the stereo can increase the chance of multiple children. Doing either slightly increases your chance for multiples. Doing both at the same time more than doubles the chances of having twins or triplets as either alone.


 * Disproved/Doubtful Twin Theories
 * Despite claims to the contrary, examination of the game's code reveals that eating spaghetti while pregnant does not increase your chance of having twins.

Pet Pregnancy
Length Pregnancy in pets typically lasts two to three days.

How to get a pet pregnant To make your pet pregnant, you need a large doghouse- this is needed for both cats and dogs- make sure that you have one male and one female, use a sim that has a good relasionship with the animal, then select the pet and use the "Have baby with..." option. The pet will go into the dog house and WooHoo.

How to tell if your pet is pregnant After the previous step you will hear the same music used for a sim that signals your pet's pregnancy

Increasing Specific Gender Odds
In the Sims 3:

The more apples that the mother eats during the pregnancy, the more likely she is to have a boy. However the more watermelons she consumes, the more likely the child is a girl.

The recent 1.3 update of the Sims3 keeps the apples for boys, watermelons for girls system, however eating these in prepared foods will not effect the gender. For example, watermelon pancakes will not undermine all of your efforts to have a boy.

However, the more recent 1.4.6 update cancels out any effect from eating food during pregnancy.

In the Sims 2:

A cheat does exist to determine the gender of the unborn child, but it is known to few. It's existence has been confirmed but it's location cannot be determined.

Other

 * Mothers get a few days off work
 * Fathers get a few days off work. Parents get few days off when they adopt a baby too.
 * Pregnant Sims experience nausea and backaches, shown as negative moodlets
 * Fulfilling a pregnant Sim's wishes improves the chances of a "happy" pregnancy, which will give the child better traits or even allow the player to select the traits. If a pregnant Sim and the father read pregnancy books the chances of a "happy" pregnancy improve, in addition to the improvement given by any wants the Sim may have to do so.
 * A Sim in the medical career can "Determine the Gender of Baby" of the pregnant Sim and can "Give Medical Advice". Clicking on the hospital allows the interaction "Get Medical Advice". They will enter the hospital and then come out after a while. This option is not available with Sims that are not pregnant.
 * If the father is on a different lot, or even at work (he will leave early), he will go to the hospital to be with the mother. This only works if the you are playing the mother's household.

Player Tips

 * You can speed up pregnancy with the Tombstone of Life and Death and it will take about three Sim hours for the baby to be born.