Hystero-Laparoscopy: Combined Assessment Inside and Outside the Uterus

Combined hystero-laparoscopy examines the uterine cavity and the pelvis in one anaesthetic, and current guidance treats it as a selective, lesion-directed step after non-invasive tests rather than a routine first investigation.

Why look both inside and outside the uterus

A woman with infertility, abnormal bleeding or pelvic pain can have disease in two places at once. Polyps, fibroids, adhesions and septa sit inside the cavity. Endometriosis, peritubal adhesions, hydrosalpinx and tubal damage sit outside it. A test that sees only one side can miss the cause.

Hysterosalpingography (HSG) shows the cavity outline and whether dye passes through the tubes, but it cannot assess pelvic pathology. Laparoscopy sees the whole pelvis and, with dye (chromopertubation), tests tubal patency, but it cannot show the inside of the cavity. Hysteroscopy shows the cavity directly and can treat what it finds. Together, hysteroscopy and laparoscopy answer both questions in one sitting, and many lesions can be treated during the same procedure.

What the guidelines say

No single guideline is titled "combined hystero-laparoscopy". The advice below comes from several bodies, and together it points one way: start with less invasive tests, and keep endoscopy for women at higher risk of disease or those with a lesion to treat.

Body	Document	Relevant position
NICE	Fertility problems, NG257 (replaces CG156)	The 2026 update covers investigation and tubal and uterine surgery, and its evidence reviews include screening hysteroscopy. The earlier CG156 advised HSG, or ultrasound HyCoSy where expertise exists, for women without comorbidities such as pelvic inflammatory disease, previous ectopic pregnancy or endometriosis, and laparoscopy with dye for women with comorbidities so tubal and pelvic disease is assessed together. Check the current NG257 wording before quoting it.
NICE	Heavy menstrual bleeding, NG88	Offer outpatient hysteroscopy when history suggests submucosal fibroids, polyps or endometrial pathology, organise services for "see-and-treat" in one visit where feasible, and take an endometrial sample only in the context of diagnostic hysteroscopy.
RCOG / BSGE	Best Practice in Outpatient Hysteroscopy (Green-top 59)	Vaginoscopy should be the standard technique, saline is the preferred distension medium, and outpatient hysteroscopy should be done outside the formal operating theatre.
RCOG	Preventing entry-related laparoscopic injuries (Green-top 49) and Consent Advice 2	Entry technique, counselling and consent for the laparoscopic part. Serious complications of diagnostic laparoscopy are quoted at about 2 in 1,000.
ESHRE	Unexplained infertility guideline, 2023	Strongly favours HyCoSy, HyFoSy or HSG over laparoscopy with chromopertubation for tubal patency, and does not recommend routine diagnostic laparoscopy. Visual proof of patency is needed when tubal risk is high.
ESHRE / ESGE	Thessaloniki CONUTA consensus	3D ultrasound is recommended for symptomatic women at high risk of a genital anomaly. The consensus notes that the role of combined ultrasound and outpatient hysteroscopy still needs prospective study.
FIGO	PALM-COEIN classification of abnormal uterine bleeding	Separates structural causes (polyp, adenomyosis, leiomyoma, malignancy and hyperplasia) from non-structural ones. Hysteroscopy is widely used to confirm and classify the structural group, for example in this series, where polyps were the commonest structural cause.

Who may benefit

The combined approach fits women in whom both the cavity and the pelvis are in question, or in whom an abnormal first-line test needs direct confirmation. Typical situations are:

Infertility with a high risk of tubal or pelvic disease: previous pelvic inflammatory disease, ectopic pregnancy, pelvic surgery or known or suspected endometriosis. NICE's earlier guidance already steered these women towards laparoscopy and dye rather than HSG alone, and ESHRE asks for visual proof of tubal patency when risk is high.
Abnormal or unclear HSG, ultrasound or sonohysterography: for example a filling defect, cornual non-filling, hydrosalpinx or a suspected cavity distortion that needs direct vision.
Suspected congenital uterine anomaly: septate uterus is the commonest anomaly in infertile women, and a 2008 critical appraisal found combined hysteroscopy and laparoscopy among the most accurate ways to classify anomalies. 3D ultrasound can match it in expert hands.
Recurrent miscarriage: the same review estimated uterine anomalies in about 16.7% of women with recurrent miscarriage, against 7.3% of infertile women and 6.7% of the general population.
Secondary infertility: in a 2026 prospective series of 250 women, synechiae, hydrosalpinx and bilateral tubal block were more frequent in secondary infertility.
Abnormal uterine bleeding or pelvic pain with a structural lesion plus suspected pelvic disease: hysteroscopy treats the intracavitary lesion (FIGO polyp or submucosal fibroid), while laparoscopy looks for endometriosis, adhesions or an adnexal cause.
Suspected female genital tuberculosis, where hysteroscopy has a recognised diagnostic role and the pelvis also needs inspection. This is relevant in South Asia.

How the procedure is done

The procedure is done under general anaesthesia, usually in the follicular phase. Order and technique vary between units, so the sequence below is the common pattern rather than a guideline requirement.

Prepare and consent. Review the earlier tests, confirm a negative pregnancy test, and consider chlamydia screening before uterine instrumentation (an older NICE priority). Discuss the laparoscopic risks and any possible operative steps in advance.
Hysteroscopy first. Inspect the vagina, cervix, cavity and both tubal ostia, using saline as the distension medium. Photograph polyps, fibroids, adhesions or a septum. Small lesions can be treated at once.
Laparoscopy next. Enter by a recommended technique (see the safety section), then inspect the uterus, tubes, ovaries, pouch of Douglas and peritoneum for endometriosis, adhesions and hydrosalpinx.
Test the tubes. Inject dye through the cervix (chromopertubation) while watching the fimbrial ends. Free spill from both tubes shows patency. Absent or delayed spill points to blockage or adhesions.
Correlate and treat. Combine the two views. Where a septum or dense adhesions are cut, laparoscopic or ultrasound guidance can lower the risk of uterine perforation. Divide pelvic adhesions, treat superficial endometriosis, drill or excise lesions as planned and consented.
Record and counsel. Document findings with images, classify them (for example by the ESHRE/ESGE or FIGO systems), and explain the next step, which may be expectant management, surgery or assisted reproduction.

If saline is used for operative hysteroscopy, fluid balance should be monitored, following the BSGE/ESGE guidance on distension media.

What the evidence shows

Direct endoscopy finds more abnormalities than imaging, but finding more is not the same as improving the chance of pregnancy. In a 2026 prospective study of 250 women with infertility in Central India, combined hystero-laparoscopy with chromopertubation detected at least one abnormality in 85.2%. Same-sitting treatment followed in 54.0%.

Comparison (250 women)	Endoscopy	Imaging
Any abnormality: combined vs transvaginal ultrasound	85.2%	55.2%
Any abnormality: combined vs HSG	85.2%	44.8%
Intrauterine abnormality: hysteroscopy vs transvaginal ultrasound	51.6%	18.0%
Tubo-pelvic abnormality: laparoscopy vs HSG	44.0%	34.4%

All differences were statistically significant (p<0.001). The authors concluded that the combined procedure works best used selectively, after non-invasive evaluation, as a lesion-directed complement and not a replacement for first-line imaging.

Earlier work points the same way. A clinical commentary on combined laparoscopy and hysteroscopy argued that HSG shows patency but no pelvic disease, and that tubal patency alone can hide extensive adhesions found years later. A Polish series of 636 infertile women used endoscopy as both diagnosis and treatment, with all intrauterine pathology treated during hysteroscopy.

Three cautions apply. These are observational studies from tertiary units, so referral bias may inflate detection rates. Detection rates alone do not show whether live-birth rates improve. And ESHRE's 2023 guideline recommends against routine diagnostic laparoscopy in unexplained infertility.

Safety, consent and risks

The laparoscopic part carries most of the serious risk. RCOG Consent Advice quotes about 2 serious complications per 1,000 diagnostic laparoscopies, meaning injury to bowel, bladder, uterus or major blood vessels that needs repair. NHS consent forms and leaflets based on that advice add a hernia risk at the entry site of under 1 in 100 and a risk of death of 3 to 8 in 100,000. The risk rises if a therapeutic step is added, and in women who are obese or have pre-existing conditions.

RCOG Green-top Guideline 49 addresses entry-related injury, which accounts for a large share of laparoscopic complications; one study it cites attributed 57% of injuries to entry. The guideline reviews closed (Veress needle), open (Hasson) and alternative entry routes and asks surgeons to counsel women about entry-specific risks.

Good consent for a combined procedure covers:

the serious risks above, in plain figures per 1,000 or 100,000
the chance of finding nothing (a negative laparoscopy)
extra procedures that may be needed, such as repair of an injury, blood transfusion or laparotomy
the planned operative steps (division of adhesions, septum resection, polypectomy) and the possibility of stopping short of them
the fact that some bowel injuries are recognised only after surgery, so fever, worsening abdominal pain or vomiting after discharge needs urgent review

On the hysteroscopic side, the RCOG/BSGE outpatient guideline recommends vaginoscopy and saline distension for comfort and image quality. Fluid deficit should be monitored during operative work. Perforation and fluid overload are the main hysteroscopic hazards, and laparoscopy provides a direct view of the serosa if perforation is suspected.

When it is not the right first test

For many women a less invasive route is safer, cheaper and just as informative. Consider combined hystero-laparoscopy unnecessary when:

The woman is low risk and tubal patency is the only question. NICE's earlier guidance called HSG a reliable way to rule out tubal occlusion that is less invasive and uses resources better than laparoscopy, and ESHRE now strongly favours HyCoSy, HyFoSy or HSG over laparoscopy with dye.
The infertility is unexplained. ESHRE does not recommend routine diagnostic laparoscopy, and a review of the evidence found that routine hysteroscopy in unexplained infertility cannot be recommended either.
Only the cavity is in question. Outpatient hysteroscopy, with see-and-treat where possible, is the NICE and RCOG/BSGE route for polyps, submucosal fibroids and endometrial pathology, and it avoids a general anaesthetic and laparoscopic risk.
Ultrasound answers the question. 3D ultrasound is an accurate way to classify a suspected uterine anomaly in experienced hands, which may spare a woman the laparoscopy.

A sensible pathway is history and examination, then ultrasound and a tubal patency test, then endoscopy for women whose risk factors or abnormal results justify direct vision, ideally with consent for the treatment that may follow. Treatment should be decided with a gynaecological endoscopist who can offer both parts.

Sources

This article is educational and does not replace individual medical advice. Guideline wording was taken from the pages below, some of them via summaries or snippets; confirm exact recommendations against the original documents before clinical use, especially NICE NG257, whose full recommendation text could not be opened here.

Hystero Laparoscopy: Combined Assessment Inside and Outside the Uterus