What you ought to understand is sexuality during pregnancy!

Understanding why making love during pregnancy is different than it is at other times can help ease fears and worries,and can make having intercourse more  acceptable and more plausible.
In order this lesson to be understandable, i need to categorize this subject into two aspects. 
1.Physically aspects
2.Psychologically aspects.
PHYSICALLY ASPECTS.

when we discuss about physical features it is understandable that we are explaining the outside effects. In this aspect, there are positive and negative effects that can make making love plausible or not.These features are as follow:-
Nausea and vomiting.If your morning sickness stay with you day and night, you may just have to wait out its symptoms. If it strikes just at certain hours, keep your schedules flexible, and put the good times to good use.Don't force to feel sexy while your lousy.
Fatigue. In the second trimester especially in four month,is the time when fatigue end because the placenta is made.Here,also you ought to know the fatigue may continue especially when you show the symptoms of having twins.For case of consuming, you suppose to choose good time if your comfortable but don't confront yourself by forcing.
The Changing shape. Making love can be both awkward and uncomfortable when it seems the belly large than ordinary. Here, you and your spouse you must understand the life of new creature in the belly. There's no need to fear but to enjoy the sexy but also you suppose to find a good way of consuming without affecting the fetus.
Leakage of colostrum. Late in pregnancy, some women begin producing the premilk called colostrum. This milk can leak especially during sexual stimulation. But nothing to worry about even if bother you or your partner. You can refrain from breast play.
Breast tenderness.it happens to some couples but the good thing is to communicate before sexual consuming in order to be comfortable for both. For many,tenderness diminishes toward the end of the first trimester, but the continued sensitivity and enlargement of the breasts enhances sex for some couples.
Alterations in vaginal secretions. Normal vaginal secretions increase in volume and change in consistency, odor,and taste during pregnancy. The increased lubrication may make intercourse more enjoyable for a couple if the woman's vagina has always been dry and or uncomfortably narrow. Or it might make the vaginal canal so wet and slippery that a man may have trouble reaching orgasm.The heavier scent and taste of the secretions may also make oral sex unpleasant to some.

Let's us see the Psychological factors that can make sexy enjoyable or not.

PSYCOLOGICAL ASPECTS .

When we talk about psychological direct we are looking for the mind factors, so the following are the aspects
Fear of hurting the fetus or causing a miscarriage. In normal pregnancies, sexual intercourse will do neither. The fetus is well cushioned and protected inside the amniotic sac and uterus,and the uterus is securely sealed off from the outside world by a mucous plug in the mouth of the cervix.
Fear that having an orgasms will stimulate miscarriage or early labor. Although the uterus does contract following orgasm-and these contractions can be quite pronounced in some women, lasting as long as half an hour after intercourse-such contractions are not a sign of labor and pose no danger in a normal pregnancy. In fact,studies show that couples who are sexually active during pregnancy have lower rates of premature labor than those who abstain.
Fear that the fetus is "watching" or "aware". Though your baby may enjoy the gentle rocking of uterine contractions during orgasm,he or she can't see what you're doing, has no idea what is happening, and will certainly have no memory of it.Fetal reactions are responses solely to hormonal and uterine activity.
Fear that the introduction of the penis into the vagina will cause infection.As long as the male doesn't have a sexually transmittable disease ,there is no danger of infection to either mother or fetus through intercourse during the first 7 or 8 months-in the amniotic sac, the baby is safe from both semen and infections organisms.
Anxiety over the coming attraction. Both the mother and father to be are subject to mixed feelings over the upcoming blessed event.Thoughts about the responsibilities and lifestyle changes and the financial and emotional cost of bringing up baby can inhibit relaxed lovemaking.
Belief that intercourse during the last six weeks of pregnancy will cause labor to begin. It is true that the uterine contractions triggered by orgasm become stronger as pregnancy proceeds.Some practitioners feel that using a condom for such women will decrease the contractions that occur due to the avoidance of the prostaglandis in the semen.
Fear or "hitting" the baby once the head is engaged in the pelvis.Even couples who were relaxed about having intercourse earlier can tighten up toward the end of pregnancy because the baby is too close for comfort. Many practitioners suggest that though deep penetration can't hurt the baby,if it's uncomfortable at this time, it should be avoided.
Though sexual intercourse during pregnancy may be different from what you've experienced before, it is in most cases perfectly safe.

Thank you for your time.