Lamotrigine, a drug used to treat epilepsy, is less effective when taken with combined oral contraceptives. The oestrogen component of the pill decreases the circulating levels of Lamotrigine, increasing the risk of seizures. The combination is therefore classified as a UKMEC 3, as the risk of the drug combination may outweigh the benefit. As an alternative, the progesterone-only pill, depo progesterone, Mirena or the copper IUD may be considered as there is no restriction on concomitant use. Lamotrigine is not metabolised through cytochrome P450 like other antiepileptic drugs such as carbamazepine and phenytoin, neither is it an enzyme inhibitor.

Cardiotocography, also known as the non-stress test is used to monitor fetal heartbeat and uterine contractions of the uterus. An abnormal CTG may indicate fetal distress and prompt an early intervention. Variability refers to the variation in the fetal heartbeat form one beat to another. Normal variability is between 5-25 beats per minute while an abnormal variability is less than 5 bpm for more than 50 minutes, or more than 25 bpm for more than 25 minutes.

A fibroid is a benign tumour of the smooth muscles of the uterus also known as a leiomyoma. It has a typical whorled appearance and this may be altered following degeneration which occurs in four main types:
1. Red degeneration, also known as carneous degeneration, of degeneration that can involve a uterine leiomyoma. While it is an uncommon type of degeneration, it is thought to be the most common form of degeneration of a leiomyoma during pregnancy. Red degeneration follows an acute disruption of the blood supply to the fibroid during growth typically in a mid-second trimester presenting as sudden onset of pain with tenderness localizing to the area of the uterus along with pyrexia and leucocytosis. On ultrasound it can have peripheral (rim).

2. Hyaline degeneration is the most common form of degeneration that can occur in a uterine leiomyoma. It is thought to occur in up to 60% of uterine leiomyomasoccurs when the fibroid outgrows its blood supply. this may progresses to central necrosis leaving a cystic space in the centre knowns as cystic degeneration.

3. Cystic degeneration is an uncommon type of degeneration that a uterine leiomyoma (fibroid) can undergo. This type of degeneration is thought to represent ,4% of all types of uterine leiomyoma degeneration. When the leiomyoma increases in size, the vascular supply to it becomes inadequate and leads to different types of degeneration: hyaline, cystic, myxoid, or red degeneration. Dystrophic calcification may also occur. Hyalinization is the commonest type of degeneration. Cystic degeneration is an extreme sequel of edema. Ultrasound may show a hypoechoic or heterogeneous uterine mass with cystic areas.

4. Myxoid degeneration of leiomyoma is one of the rarer types of degeneration that can occur in a uterine leiomyoma. While this type of degeneration is generally considered rare, the highest prevalence for this type of degeneration has been reported as up to 50% of all degenerations of leiomyomas. Fibroids (i.e. uterine leiomyomas) that have undergone myxoid degeneration are filled with a gelatinous material and can be difficult to differentiate from cystic degeneration; however, they typically appear as more complex cystic masses. They appear hypocellular with a myxoid matrix.

Wound healing is initiated when inflammation begins. Macrophages predominate after neutrophils and peak 3-4 days after inflammation begins. They destroy and phagocytose the organism and debris using enzymes. The next step is the resolution of inflammation and healing of the wound.

Fetal attitude is defined as the relation of the various parts of the foetus to each other. In the normal attitude, the foetus is in universal flexion. The anatomic explanation for this posture is that it enables the foetus to occupy the least amount of space in the intrauterine cavity. The fetal attitude is extremely difficult, if not impossible, to assess without the help of an ultrasound examination.

Fetal lie refers to the relationship between the long axis of the foetus relative to the long axis of the mother. If the foetus and maternal column are parallel (on the same long axis), the lie is termed vertical or longitudinal lie.

Fetal presentation means, the part of the foetus which is overlying the maternal pelvic inlet.

Position is the positioning of the body of a prenatal foetus in the uterus. It will change as the foetus develops. This is a description of the relation of the presenting part of the foetus to the maternal pelvis. In the case of a longitudinal lie with a vertex presentation, the occiput of the fetal calvarium is the landmark used to describe the position. When the occiput is facing the maternal pubic symphysis, the position is termed direct occiput anterior.

Amniocentesis is a prenatal procedure performed on a pregnant woman to withdraw a small amount of amniotic fluid from the sac surrounding the foetus.
The goal of amniocentesis is to examine a small amount of this fluid to obtain information about the baby, including its sex, and to detect physical abnormalities such as Down syndrome or spina bifida.
Amniocentesis is only performed on women thought to be at higher risk of delivering a child with a birth defect.

Amniocentesis is performed between 16 and 20 weeks into the pregnancy. By around this time, the developing baby is suspended in about 130ml of amniotic fluid, which the baby constantly swallows and excretes. A thin needle is used to withdraw a small amount of this fluid from the sac surrounding the foetus.

Involution of the uterus takes 4-6 weeks

The most probable cause of her presentation is a mixed infection with Chlamydia trachoma and vaginal pathogens.

Her most likely diagnosis is pelvic inflammatory disease (PID) as suggested by a purulent vaginal discharge alongside a fever which indicates a systemic infection.

The most common causative organisms in PID after sexual activity are chlamydia and gonorrhoea, of which chlamydia has a much higher prevalence.

Chlamydia has also been shown to be present in about 15% of subjects who underwent pregnancy termination with no constant sexual partner.

PID occurring after a gynaecologic surgical procedure is most commonly a result of mycoplasma or vaginal pathogens.

Bacterial Vaginosis is a common condition which results in a foul smelling discharge from the vagina without any inflammation. It is the most common cause of abnormal PV discharge. Most of the women are asymptomatic carriers.

Normal position of the foetus in relationship to the mother is always a longitudinal lie and a cephalic presentation. Transverse lie means that the baby is sideways. The foetus lies transverse till 26-28th week of gestation, after which it usually changes its position from transverse to a longitudinal lie with head down. A transverse lie can occur in conditions like grand multiparity, preterm foetus, placenta previa and pelvic contraction.